UPDATE:
The Duke and Duchess of Cambridge celebrate their fourth wedding anniversary on Wednesday – as they await the birth of their second child.
With the baby overdue, the couple are spending time at Kensington Palace, as they wait for Kate to go into labour.
Unless Kate is admitted to hospital, it’s expected the couple will mark their anniversary privately in a low key manner.
The royal baby could make an appearance on the royal wedding anniversary
The Duchess was spotted driving herself away from Buckingham Palace yesterday.
The heavily-pregnant 33-year-old was said to have been taking son George to use the pool at the Queen's London residence.
Swimming is one of the best forms of exercise for pregnant women, with the water supporting their bump.
The Cambridges, who met at university, married at Westminster Abbey on April 29 2011, watched by a global television audience of millions.
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Fourth wedding anniversaries are traditionally marked with gifts of fruit or flowers, but royal fans are hoping the baby will make it a double celebration for the Duke and Duchess by making its debut before the end of the day.
Fewer than one in 20 women give birth on their due date. On the NHS, induction is offered to women who go two weeks overdue, but Kate is having her baby at the private Lindo Wing of St Mary's Hospital, in Paddington, London.
April 29 is also the 50th birthday of Kate's uncle Gary Goldsmith - the brother of her mother Carole Middleton.
Actor Sir Daniel Day-Lewis, former cricketer Phil Tufnell, actress Michelle Pfeiffer and Edward VII's mistress Alice Keppel - the Duchess of Cornwall's great-grandmother - were also born on April 29.
The funeral service of the Duchess of Windsor, for whom Edward VIII abdicated the throne, took place at St George's Chapel on April 29 in 1986.
Kate Middleton Loves A Cuddle
Duchess of Cambridge visits Liverpool(01 of69)
The Duchess of Cambridge is hugged by three year old Nancy Williams, from the Old School Nursery in Knotty Ash, as she arrives at Alder Hey Hospital, Liverpool. (credit:PA)
Duchess of Cambridge visits Hope House treatment centre in Clapham(02 of69)
Britain's Kate, The Duchess of Cambridge receives flowers, as she leaves after a visit to Hope House, in London, Tuesday, Feb. 19, 2013. As patron of Action on Addiction, the Duchess was visiting Hope House, a safe, secure place for women to recover from substance dependence. (AP Photo/Matt Dunham) (credit:AP)
Royal visit to North East(03 of69)
Composite photos of the Duchess of Cambridge greeting Terry Campbell, 10, during a visit to Newcastle Civic Centre, Newcastle-on-Tyne. (credit:PA)
The Duchess of Cambridge hugs six-year-old Diamond Marshall as the Royal Couple arrives in Calgary Thursday, July 7, 2011.(04 of69)
The Duchess of Cambridge hugs six-year-old Diamond Marshall as the Royal Couple arrives in Calgary Thursday, July 7, 2011.
The Duchess of Cambridge hugs six-year-old Diamond Marshall as the Royal Couple arrives in Calgary Thursday, July 7, 2011.(05 of69)
The Duchess of Cambridge hugs six-year-old Diamond Marshall as the Royal Couple arrives in Calgary Thursday, July 7, 2011.
The Duke And Duchess Of Cambridge Official Visit To Peterborough(06 of69)
Catherine, Duchess of Cambridge meets Emma Henson , aged 7 at Peterborough City Hospital during an official visit to Peterborough on November 28, 2012 in Peterborough, England. (credit:Getty Images)
Duchess of Cambridge Visits St Andrew's School(07 of69)
Catherine, Duchess of Cambridge visits St. Andrew's School on November 30, 2012 in Pangbourne, England. The Duchess returned to her old school she attended between 1986 till 1995 to meet students and teachers. (credit:Getty Images)
Catherine, Duchess of Cambridge Visits St Andrew's School(08 of69)
PANGBOURNE, UNITED KINGDOM - NOVEMBER 30: Catherine, Duchess of Cambridge takes part in a day of activities and festivities to mark the occasion of St Andrew's Day at St Andrew's School on November 30, 2012 in Pangbourne, Berkshire, England. The Duchess visited the Pre-Prep School for under-5s, unveiled a plaque to officially open a new artificial turf playing field and met members of the school's hockey team, which she played for during her time as a pupil at the school (1986-1995). The Duchess also toured the school privately and watched the school's Progressive Games which are traditional games played indoors by teachers and students on St. Andrew's Day. (Photo by Arthur Edwards - WPA Pool/Getty Images) (credit:Getty Images)
Reception To Mark Launch Of Tusk's US Patrons Circle(09 of69)
LOS ANGELES, CA - JULY 10: Catherine, Duchess of Cambridge meets a young member of the public during an impromptu walkabout outside their residence on July 10, 2011 in Los Angeles, California. The newly married Royal Couple are on the final day of their first joint overseas tour to the USA. They arrived on Friday after spending 9 days in Canada. The couple started off their tour of North America by joining millions of Canadians in taking part in Canada Day celebrations which mark Canada's 144th Birthday. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
Duke and Duchess of Cambridge in Canada - Day Seven(10 of69)
The Duchess of Cambridge talks to Riley Oldford, 6, at Yellowknife Airport, before boarding a plane with the Duke of Cambridge as they leave north west Canada following their visit. (credit:PA)
Duchess of Cambridge visits East Anglia's Children's Hospices(11 of69)
Catherine, Duchess of Cambridge received a posy of flowers as she officially opens The Treehouse Children's Hospice in Ipswich on March 19, 2012. (credit:PA)
The Duke And Duchess Of Cambridge Attend The Irish Guards Medal Parade(12 of69)
WINDSOR, ENGLAND - JUNE 25: A lady and her daughter present flowers to Catherine, Duchess of Cambridge as Prince William, Duke of Cambridge looks on at the Victoria Barracks on June 25, 2011 in Windsor, England. The Duchess of Cambridge and Duke of Cambridge are at the barracks to present service medals to members of the Irish Guards (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Duchess Of Cambridge Visits Liverpool(13 of69)
LIVERPOOL, ENGLAND - FEBRUARY 14: Catherine, Duchess of Cambridge poses for photographs with young girls as she visits Alder Hey Children's NHS Foundation Trust on February 14, 2012 in Liverpool, England. The Duchess has spent the day in Liverpool and arrived at Alder Hey Hospital after a visit to 'The Brink'. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Duchess Of Cambridge Visits Liverpool(14 of69)
LIVERPOOL, ENGLAND - FEBRUARY 14: Catherine, Duchess of Cambridge hugs Nancy Williams, aged 3, as she visits Alder Hey Children's NHS Foundation Trust on February 14, 2012 in Liverpool, England. The Duchess has spent the day in Liverpool and arrived at Alder Hey Hospital after a visit to 'The Brink'. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
Catherine, Duchess of Cambridge talks to(15 of69)
Catherine, Duchess of Cambridge talks to a child as she attends the UK Premiere of 'African Cats' on April 25, 2012 in London. Their attendance at the premiere of African Cats was their first public engagement since Prince William returned from his deployment in the Falklands. The royal couple will mark the first anniversary of their marriage on April 29. AFP Photo by Chris Jackson - WPA Pool /Getty Images (Photo credit should read Chris Jackson/AFP/GettyImages) (credit:Getty Images)
Suhani Kapoor (R) gives an Aslan lion cu(16 of69)
Suhani Kapoor (R) gives an Aslan lion cuddly toy to Catherine, Duchess of Cambridge, as she hosts 150 children and young people from The Art Room at a performance of 'The Lion, The Witch and The Wardrobe' at Kensington Gardens in London on June 15, 2012. AFP PHOTO / POOL / Rebecca Naden (Photo credit should read REBECCA NADEN/AFP/GettyImages) (credit:Getty Images)
Suhani Kapoor (R) gives an Aslan lion cu(17 of69)
Suhani Kapoor (R) gives an Aslan lion cuddly toy to Catherine, Duchess of Cambridge, as she hosts 150 children and young people from The Art Room at a performance of 'The Lion, The Witch and The Wardrobe' at Kensington Gardens in London on June 15, 2012. AFP PHOTO / POOL / Rebecca Naden (Photo credit should read REBECCA NADEN/AFP/GettyImages) (credit:Getty Images)
The Duke And Duchess Of Cambridge Diamond Jubilee Tour - Day 2(18 of69)
SINGAPORE - SEPTEMBER 12: Catherine, Duchess of Cambridge speaks with four-year-old Maeve Low (L) as she tours the Rolls-Royce Seletar Campus during the Diamond Jubilee tour at Seletar Aerospace Park on September 12, 2012 in Singapore. (Photo by Danny Lawson - Pool/Getty Images) (credit:Getty Images)
The Duke And Duchess Of Cambridge Diamond Jubilee Tour - Day 2(19 of69)
SINGAPORE - SEPTEMBER 12: Prince William, Duke of Cambridge (L) and Catherine, Duchess of Cambridge (R) pose with four-year-old Maeve Low as they tour the Rolls-Royce Seletar Campus during the Diamond Jubilee tour at Seletar Aerospace Park on September 12, 2012 in Singapore. (Photo by Danny Lawson - Pool/Getty Images) (credit:Getty Images)
The Duke And Duchess Of Cambridge Diamond Jubilee Tour - Day 2(20 of69)
SINGAPORE - SEPTEMBER 12: Catherine, Duchess of Cambridge is given flowers by a young girl as she attends a cultural event in Queenstown on day 2 of Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge's Diamond Jubilee Tour of the Far East on September 12, 2012 in Singapore. Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge are on a Diamond Jubilee Tour of the Far East taking in Singapore, Malaysia, the Solomon Islands and the tiny Pacific Island of Tuvalu. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
SINGAPORE-BRITAIN-ROYALS(21 of69)
Britain's Prince William (centre R) and his wife Catherine (C), the Duchess of Cambridge, speak to a young girl during their visit to Strathmore Green, a precinct in Queenstown, a residential district of Singapore on September 12, 2012. Britain's Prince William and his wife Catherine arrived in Singapore on September 11 to kick off a nine-day Southeast Asian and Pacific tour marking Queen Elizabeth II's Diamond Jubilee. AFP PHOTO / ROSLAN RAHMAN (Photo credit should read ROSLAN RAHMAN/AFP/GettyImages) (credit:Getty Images)
SINGAPORE-BRITAIN-ROYAL(22 of69)
Catherine (R), the Duchess of Cambridge, receives flowers from a girl during her visit to Strathmore Green, a precinct in Queenstown, a residential district of Singapore on September 12, 2012. Britain's Prince William and his wife Catherine arrived in Singapore on September 11 to kick off a nine-day Southeast Asian and Pacific tour marking Queen Elizabeth II's Diamond Jubilee. AFP PHOTO / POOL / Nicolas ASFOURI (Photo credit should read NICOLAS ASFOURI/AFP/GettyImages) (credit:Getty Images)
The Duke And Duchess Of Cambridge Diamond Jubilee Tour - Day 2(23 of69)
SINGAPORE - SEPTEMBER 12: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge pose with a young artist as they visit The Rainbow Centre on day 2 of the Diamond Jubilee Tour of the Far East on September 12, 2012 in Singapore. Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge are on a Diamond Jubilee Tour of the Far East taking in Singapore, Malaysia, the Solomon Islands and the tiny Pacific Island of Tuvalu. (Photo by Arthur Edwards - Pool/Getty Images) (credit:Getty Images)
The Duke And Duchess Of Cambridge Diamond Jubilee Tour - Day 2(24 of69)
SINGAPORE - SEPTEMBER 12: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge pose with children as they visit The Rainbow Centre on day 2 of the Diamond Jubilee Tour of the Far East on September 12, 2012 in Singapore. Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge are on a Diamond Jubilee Tour of the Far East taking in Singapore, Malaysia, the Solomon Islands and the tiny Pacific Island of Tuvalu. (Photo by Arthur Edwards - Pool/Getty Images) (credit:Getty Images)
SINGAPORE-BRITAIN-ROYALS(25 of69)
Catherine, the Duchess of Cambridge, receives a gift from a girl during her visit to Strathmore Green, a precinct in Queenstown, a residential district of Singapore on September 12, 2012. Britain's Prince William and his wife Catherine arrived in Singapore on September 11 to kick off a nine-day Southeast Asian and Pacific tour marking Queen Elizabeth II's Diamond Jubilee. AFP PHOTO / POOL / Nicolas ASFOURI (Photo credit should read NICOLAS ASFOURI/AFP/GettyImages) (credit:Getty Images)
SOLOMONS-BRITAIN-ROYALS(26 of69)
Britain's Catherine, the Duchess of Cambridge talks to a girl at the renovated Commonwealth Street in central Honiara on September 17, 2012. Britain's Prince William and wife Catherine are on a nine-day tour marking Queen Elizabeth II's Diamond Jubilee, and have already visited Singapore and Malaysia before arriving in the Solomon Islands. AFP PHOTO / Daniel Munoz / POOL (Photo credit should read DANIEL MUNOZ/AFP/GettyImages) (credit:Getty Images)
SOLOMONS-BRITAIN-ROYALS(27 of69)
Britain's Prince William and his wife Catherine, the Duchess of Cambridge talk to two girls at the renovated Commonwealth Street in central Honiara on September 17, 2012. Britain's Prince William and wife Catherine are on a nine-day tour marking Queen Elizabeth II's Diamond Jubilee, and have already visited Singapore and Malaysia before arriving in the Solomon Islands. AFP PHOTO / Daniel Munoz / POOL (Photo credit should read DANIEL MUNOZ/AFP/GettyImages) (credit:Getty Images)
Scott-Amundsen Centenary Race reception(28 of69)
The Duchess of Cambridge talks to Vic Vicary, who holds his three week old son Hugo Eric Scott Vicary during a reception to celebrate the Scott-Amundsen Centenary Race to the South Pole at Goldsmiths Hall in the City of London. (credit:PA)
Catherine, the Duchess of Cambridge meet(29 of69)
Catherine, the Duchess of Cambridge meets with 6-year-old Diamond Marshall as she arrives with Prince William at Calgary International Airport in Calgary on July 7, 2011. The Make-a-Wish Foundation arranged for Marshall, a cancer patient, to greet the royal couple. AFP PHOTO / TIMOTHY A. CLARY (Photo credit should read TIMOTHY A. CLARY/AFP/Getty Images) (credit:Getty Images)
The Duchess Of Cambridge Visits Liverpool(30 of69)
LIVERPOOL, ENGLAND - FEBRUARY 14: Catherine, Duchess of Cambridge meets young girls as she visits Alder Hey Children's NHS Foundation Trust on February 14, 2012 in Liverpool, England. The Duchess has spent the day in Liverpool and arrived at Alder Hey Hospital after a visit to 'The Brink'. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Duchess Of Cambridge Visits Liverpool(31 of69)
LIVERPOOL, ENGLAND - FEBRUARY 14: Catherine, Duchess of Cambridge meets a young girl as she visits Alder Hey Children's NHS Foundation Trust on February 14, 2012 in Liverpool, England. The Duchess has spent the day in Liverpool and arrived at Alder Hey Hospital after a visit to 'The Brink'. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Duchess Of Cambridge Visits Rose Hill Primary School(32 of69)
OXFORD, ENGLAND - FEBRUARY 21: Catherine, Duchess of Cambridge meets children as she arrives at Rose Hill Primary School during a visit to Oxford on February 21, 2012 in Oxford, England. The visit is in association with the charity Art Room who work with children to increase self-confidence and self-esteem (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
Catherine, Duchess Of Cambridge Visits Rose Hill Primary School(33 of69)
OXFORD, UNITED KINGDOM - FEBRUARY 21, 2012: Catherine Duchess of Cambridge meets pupiles during her visit to Rose Hill Primary School on February 21, 2012 in Oxford, England. Catherine, Duchess of Cambridge, as patron of charity The Art Room, visited two schools in Oxford in association with the organisation that works with children to increase self-confidence and self-esteem. (Photo by Steve Parsons - WPA Pool/Getty Images) (credit:Getty Images)
Catherine, Duchess of Cambridge, meets c(34 of69)
Catherine, Duchess of Cambridge, meets children during a visit to the Prince's Foundation for Children and the Arts at the Dulwich Gallery in South London on March 15, 2012. AFP PHOTO / POOL / JOHN STILLWELL (Photo credit should read JOHN STILLWELL/AFP/Getty Images) (credit:Getty Images)
The Duchess Of Cambridge Visits The Irish Guards On Their St Patrick's Day Parade(35 of69)
ALDERSHOT, ENGLAND - MARCH 17: Catherine, Duchess of Cambridge meets two young girls, who handed her a delicate posy as she presents shamrocks to members of the 1st Battalion Irish Guards at the St Patrick's Day Parade at Mons Barracks on Saturday March 17, 2012 in Aldershot, England. 450 soldiers were on parade, accompanied by the regimental mascot Conmeal, an Irish wolfhound who received his own sprig of shamrock from the Duchess. This was her first solo military engagement and she will now inherit a tradition which begun in 1901 by Queen Alexandra and more recently carried out for 32 years by the Queen Mother. Prince William is honorary Colonel of the Irish Guards. (Photo by Paul Vicente - WPA Pool/Getty Images) (credit:Getty Images)
Catherine, Duchess Of Cambridge Visits The Treehouse Children's Centre(36 of69)
LONDON, ENGLAND - MARCH 19: Catherine, Duchess of Cambridge meets a young fan during a visit to open The Treehouse Children's Hospice on March 19, 2012 in Ipswich, England. (Kirsty Wigglesworth - WPA Pool/Getty Images) (credit:Getty Images)
The Duke And Duchess Of Cambridge Tour Southeast Asia - Day 3(37 of69)
KUALA LUMPUR, MALAYSIA - SEPTEMBER 13: Catherine, Duchess of Cambridge meets leukemia sufferer Zakwan Anuar, 15, at Hospis Malaysia on Day 3 of Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge's Diamond Jubilee Tour of South East Asia on September 13, 2012 in in Kuala Lumpur, Malaysia. Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge are on a Diamond Jubilee Tour of South East Asia and the South Pacific taking in Singapore, Malaysia, Solomon Islands and Tuvalu. (Photo by Arthur Edwards - Pool/Getty Images) (credit:Getty Images)
MALAYSIA-BRITAIN-ROYALS(38 of69)
Britain's Prince William and his wife Catherine, the Duchess of Cambridge meets with students while walking in the gardens of the KLCC in Kuala Lumpur on September 14, 2012, on the second leg of a nine-day Southeast Asian and Pacific tour marking Queen Elizabeth II's Diamond Jubilee. AFP PHOTO (Photo credit should read AFP/AFP/GettyImages) (credit:Getty Images)
The Duke And Duchess Of Cambridge Diamond Jubilee Tour - Day 7(39 of69)
HONIARA, SOLOMON ISLANDS - SEPTEMBER 17: Catherine, Duchess of Cambridge meets a young well-wisher as she attends a Women's Reception at the Leaf House, Commonwealth Youth South Pacific Centre on day 7 of their Diamond Jubilee Tour, on September 17, 2012 in Honiara, Solomon Islands. Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge arrived in the Solomon Islands as the first stop of the Pacific leg of their nine day Diamond Jubilee Tour of the Far East and South Pacific. (Photo by Danny Lawson - Pool/Getty Images) (credit:Getty Images)
The Duke & Duchess Of Cambridge Visit Newcastle(40 of69)
NEWCASTLE UPON TYNE, UNITED KINGDOM - OCTOBER 10: Catherine, Duchess of Cambridge meets children as she visits Elswick Park where she visited a community garden on October 10, 2012 in Newcastle Upon Tyne, England. (Photo by Samir Hussein/Getty Images) (credit:Getty Images)
The Duke & Duchess Of Cambridge Visit Newcastle(41 of69)
NEWCASTLE UPON TYNE, UNITED KINGDOM - OCTOBER 10: Catherine, Duchess of Cambridge meets children as she visits Elswick Park where she visited a community garden on October 10, 2012 in Newcastle Upon Tyne, England. (Photo by Samir Hussein/Getty Images) (credit:Getty Images)
Royal visit to Cambridgeshire(42 of69)
The Duchess of Cambridge meets Emma Henson, 7, during a visit to Peterborough City Hospital in Cambridgeshire, as part of an official visit to Cambridge. (credit:PA)
Royal visit to Cambridgeshire(43 of69)
The Duchess of Cambridge meets Emma Henson, 7, during a visit to Peterborough City Hospital in Cambridgeshire, as part of an official visit to Cambridge. (credit:PA)
Royal visit to Cambridgeshire (44 of69)
The Duchess of Cambridge meets pupils as she visits Manor School during an official visit to Cambridge with the Duke of Cambridge. PRESS ASSOCIATION Photo. Picture date: Wednesday November 28, 2012. William and Kate will toured Cambridge for the first time since they adopted their titles on their wedding day in April last year. See PA story ROYAL Cambridge. Photo credit should read: Chris Jackson/PA Wire (credit:PA)
Royal visit to Cambridgeshire (45 of69)
The Duchess of Cambridge meets pupils as she visits Manor School during an official visit to Cambridge with the Duke of Cambridge. PRESS ASSOCIATION Photo. Picture date: Wednesday November 28, 2012. William and Kate will toured Cambridge for the first time since they adopted their titles on their wedding day in April last year. See PA story ROYAL Cambridge. Photo credit should read: Chris Jackson/PA Wire (credit:PA)
Royal visit to Cambridgeshire(46 of69)
The Duchess of Cambridge meets pupils as she visits Manor School during an official visit to Cambridge with the Duke of Cambridge. (credit:PA)
Royal visit to Cambridgeshire(47 of69)
The Duchess of Cambridge meets James William Davies, 5 months, who was named after Prince William, with mother Tessa Davies during a walkabout in Cambridge. (credit:PA)
Royal visit to Cambridgeshire(48 of69)
The Duchess of Cambridge meets Oliver Duell, 7, at the Guildhall in Cambridge. (credit:PA)
Royal tour of the Far East and South Pacific - Day Two(49 of69)
The Duke of Cambridge meets well wishers during a visit to Queenstown in Singapore, as part of a nine-day tour of the Far East and South Pacific, with the Duchess of Cambridge, in honour of the Queen's Diamond Jubilee. (credit:PA)
Royal tour of the Far East and South Pacific - Day Two(50 of69)
The Duchess of Cambridge meets children during a visit to the Rainbow Centre at the Queenstown Housing Estate in Singapore, as part of a nine-day tour of the Far East and South Pacific, with the Duke of Cambridge, in honour of the Queen's Diamond Jubilee. (credit:PA)
Royal tour of the Far East and South Pacific - Day Two(51 of69)
The Duchess of Cambridge meets children during a visit to the Rainbow Centre at the Queenstown Housing Estate in Singapore, as part of a nine-day tour of the Far East and South Pacific, with the Duke of Cambridge, in honour of the Queen's Diamond Jubilee. (credit:PA)
Royal tour of the Far East and South Pacific - Day Two(52 of69)
The Duchess of Cambridge meets children during a visit to the Rainbow Centre at the Queenstown Housing Estate in Singapore, as part of a nine-day tour of the Far East and South Pacific, with the Duke of Cambridge, in honour of the Queen's Diamond Jubilee. (credit:PA)
Royal tour of the Far East and South Pacific - Day Two(53 of69)
The Duchess of Cambridge meets children during a visit to the Rainbow Centre at the Queenstown Housing Estate in Singapore, as part of a nine-day tour of the Far East and South Pacific, with the Duke of Cambridge, in honour of the Queen's Diamond Jubilee. (credit:PA)
Royal tour of the Far East and South Pacific - Day Two(54 of69)
The Duchess of Cambridge meets children during a visit to the Rainbow Centre at the Queenstown Housing Estate in Singapore, as part of a nine-day tour of the Far East and South Pacific, with the Duke of Cambridge, in honour of the Queen's Diamond Jubilee. (credit:PA)
Royal tour of the Far East and South Pacific - Day Two(55 of69)
The Duchess of Cambridge meets children during a visit to the Rainbow Centre at the Queenstown Housing Estate in Singapore, as part of a nine-day tour of the Far East and South Pacific, with the Duke of Cambridge, in honour of the Queen's Diamond Jubilee. (credit:PA)
Royal tour of the Far East and South Pacific - Day Two(56 of69)
The Duchess of Cambridge meets children during a visit to the Rainbow Centre at the Queenstown Housing Estate in Singapore, as part of a nine-day tour of the Far East and South Pacific, with the Duke of Cambridge, in honour of the Queen's Diamond Jubilee. (credit:PA)
Royal tour of the Far East and South Pacific - Day Two(57 of69)
The Duchess of Cambridge meets well wishers during a visit to Queenstown in Singapore, as part of a nine-day tour of the Far East and South Pacific, with the Duke of Cambridge, in honour of the Queen's Diamond Jubilee. (credit:PA)
Royal visit to Nottingham(58 of69)
Duchess of Cambridge meets with local children at the Council House, in Nottingham. (credit:PA)
Diamond Jubilee celebrations - Thames Pageant(59 of69)
The Duchess of Cambridge meets well wishers before boarding the Spirit of Chartwell for the Diamond Jubilee Pageant on the River Thames in London. (credit:PA)
Duke and Duchess of Cambridge in Canada - Day Five(60 of69)
The Duchess of Cambridge meets well wishers during a visit to Dalvay by the Sea, Prince Edward Island, Canada. (credit:PA)
Royal visit to open hospital unit(61 of69)
The Duchess of Cambridge meets patient Fabian Bate, nine, during a visit with her husband, The Duke of Cambridge, to the new Oak Centre for Children and Young People at The Royal Marsden Hospital in Sutton, London. (credit:PA)
Duchess of Cambridge visits East Anglia's Children's Hospices(62 of69)
Duchess of Cambridge meets a young fan during her visit to the Treehouse, part of the East Anglia's Children's Hospices, in Ipswich. (credit:PA)
Duchess of Cambridge visits East Anglia's Children's Hospices(63 of69)
Duchess of Cambridge meets Callum Wombwell during her visit to the Treehouse, part of the East Anglia's Children's Hospices, in Ipswich. (credit:PA)
Duchess of Cambridge visits East Anglia's Children's Hospices(64 of69)
Duchess of Cambridge meets Bethany Woods in a music class during her visit to the Treehouse, part of the East Anglia's Children's Hospices, in Ipswich. (credit:PA)
Royal visit to open hospital unit(65 of69)
The Duke of Cambridge meets patient Ellis Andrews during a visit with the Duchess of Cambridge, to open the new Oak Centre for Children and Young People at The Royal Marsden Hospital in Sutton, London. (credit:PA)
Duke and Duchess of Cambridge visit Denmark(66 of69)
The Duchess of Cambridge meets with youngsters during her visit to the UNICEF Supply Division Centre, as the Duke and Duchess of Cambridge take part in their first joint humanitarian mission. (credit:PA)
Royal visit to open hospital unit(67 of69)
The Duchess of Cambridge meets patient Fabian Bate, nine, during a visit with her husband, The Duke of Cambridge, to the new Oak Centre for Children and Young People at The Royal Marsden Hospital in Sutton, London. (credit:PA)
Duke and Duchess of Cambridge in California - Day Three(68 of69)
The Duchess of Cambridge meets young members of the public during an impromptu walkabout outside their residence in Los Angeles, California, USA. (credit:PA)
Duke and Duchess of Cambridge in Canada - Day One(69 of69)
The Duke and Duchess of Cambridge meets the locals while on a walkabout outside the official residence of the Governor General of Canada, Rideau Hall in Ottawa, on the first day of their visit to the Commonwealth country. (credit:PA)
William and Kate's wedding anniversary is now the favourite date for the arrival of their new son or daughter, with bookmakers William Hill giving odds of 7/2.
But punters are also betting heavily on a big baby, with a child weighing between 8lbs and 9lbs the new favourite, cut from 9/4 to 6/2.
Rupert Adams, of William Hill, said: "Punters are latching on to the fact that the baby is increasingly late and believe that, as a result, Kate will deliver a whopper."
Betfair suspended betting on the royal baby being born on William and Kate's anniversary after a string of bets.
Coral said Alice remained the favourite name at 5/4, but that Victoria was proving particularly popular - with odds being cut from 12/1 to 7/1. William and Kate do not know whether they are having a boy or a girl.
Royal super-fans, who have been camped outside the Lindo wing for more than a week, were treated to a special delivery of pastries from the Cambridges on Tuesday.
William and Kate thanked ardent supporters at St Mary's Hospital in Paddington, London, by sending them two boxes of breakfast pastries and coffee.
Well-wishers believe the royal baby - who will be fourth in line to the throne, the Queen's fifth great-grandchild and a younger brother or sister for George - could be a girl after the parcels arrived wrapped in pink ribbon.
The Royal Wedding
Prince William, Kate, Duchess of Cambridge, Kate Middleton(01 of45)
Britain's Prince William, left, and his wife Kate, the Duchess of Cambridge, walk down the aisle hand in hand following their marriage at Westminster Abbey, London, Friday, April 29, 2011. (AP Photo/David Jones, Pool) (credit:AP)
Kate Middleton, Prince William(02 of45)
Britain's Prince William, foreground left, and his wife Kate, the Duchess of Cambridge, foreground right, best man Britain's Prince Harry, back left, and maid of honour Philippa Middleton, back right, accompany them following their wedding service at Westminster Abbey in London, Friday, April 29, 2011. (AP Photo/Kirsty Wigglesworth, Pool) (credit:AP)
Kate Middleton, Michael Middleton(03 of45)
Bride Kate Middleton walks down the isle with father Michael at Westminster Abbey, central London, for her wedding to Britain's Prince William, Friday April 29, 2011. (AP Photo/Andrew Milligan/Pool) (credit:AP)
(04 of45)
In this image taken from video, Britain's Prince William, left, takes the hand of his bride, Kate Middleton, as they stand at the altar at Westminster Abbey for the Royal Wedding in London on Friday, April, 29, 2011. (AP Photo/APTN) EDITORIAL USE ONLY NO ARCHIVE PHOTO TO BE USED SOLELY TO ILLUSTRATE NEWS REPORTING OR COMMENTARY ON THE FACTS OR EVENTS DEPICTED IN THIS IMAGE (credit:AP)
(05 of45)
In this image taken from video, Britain's Prince William, left, places the ring on the finger of his bride, Kate Middleton, as they stand at the altar at Westminster Abbey for the Royal Wedding in London on Friday, April, 29, 2011. (AP Photo/APTN) EDITORIAL USE ONLY NO ARCHIVE PHOTO TO BE USED SOLELY TO ILLUSTRATE NEWS REPORTING OR COMMENTARY ON THE FACTS OR EVENTS DEPICTED IN THIS IMAGE (credit:AP)
Prince William, Kate Middleton, Kate, Duchess of Cambridge(06 of45)
Kate Middleton and Britain's Prince William kneel at the altar during their wedding service at Westminster Abbey, London, Friday April 29, 2011. (AP Photo/Dominic Lipinski, Pool) (credit:AP)
Prince William, Kate Middleton(07 of45)
Britain's Prince William and Kate Middleton at Westminster Abbey, London, during their wedding service, Friday April 29, 2011. (AP Photo/Anthony Devlin, Pool) (credit:AP)
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Kate Middleton, left, and accompanied by maid of honour Pippa Middleton as they arrive at Westminster Abbey at the Royal Wedding in London Friday, April 29, 2011. (AP Photo/Alastair Grant) (credit:AP)
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Kate Middleton is accompanied by maid of honour Pippa Middleton, right, as she arrives at Westminster Abbey at the Royal Wedding in London Friday, April 29, 2011. (AP Photo/Alastair Grant) (credit:AP)
Prince William, Kate Middleton, Michael Middleton(10 of45)
Prince William and Kate Middleton stand at the altar with Kate's father Michael Middleton inside Westminster Abbey where the couple will marry Friday April, 29, 2011. (AP Photo/Dominic Lipinski/Pool) (credit:AP)
(11 of45)
In this image taken from video, Kate Middleton waves as she arrives at Westminster Abbey for the Royal Wedding in London on Friday, April, 29, 2011. (AP Photo/APTN) EDITORIAL USE ONLY NO ARCHIVE PHOTO TO BE USED SOLELY TO ILLUSTRATE NEWS REPORTING OR COMMENTARY ON THE FACTS OR EVENTS DEPICTED IN THIS IMAGE (credit:AP)
(12 of45)
Kate Middleton, left, arrives for her wedding with Britain's Prince William as her maid of honour Pippa Middleton holds the train and Michael Middleton, Kate Middleton's father, front, looks on at Westminster Abbey at the Royal Wedding in London Friday, April 29, 2011. (AP Photo/Gero Breloer) (credit:AP)
(13 of45)
Kate Middleton, left, waves as she arrives at Westminster Abbey with her sister Pippa at the Royal Wedding with Britain's Prince William in London Friday, April, 29, 2011. (AP Photo/Martin Meissner) (credit:AP)
Kate Middleton(14 of45)
Kate Middleton arrives at Westminster Abbey ahead of her marriage to Britain's Prince William, in London, Friday, April, 29, 2011. (AP Photo/PA, Gareth Fuller) UNITED KINGDOM OUT, NO SALES, NO ARCHIVE (credit:AP)
Prince William Prince Harry(15 of45)
Britain's Prince William, accompanied by his brother Prince Harry, arrives at Westminster Abbey ahead of his wedding to Kate Middleton, in London, Friday April 29, 2011.(AP Photo/Steve Parsons-pa) UNITED KINGDOM OUT: NO SALES: NO ARCHIVE: (credit:AP)
(16 of45)
In this image taken from video, Carole Middleton, Kate Middleton's mother, arrives Westminster Abbey for the Royal Wedding in London on Friday, April, 29, 2011. (AP Photo/APTN) EDITORIAL USE ONLY NO ARCHIVE PHOTO TO BE USED SOLELY TO ILLUSTRATE NEWS REPORTING OR COMMENTARY ON THE FACTS OR EVENTS DEPICTED IN THIS IMAGE (credit:AP)
Britain's Prince William and his wife Ka(17 of45)
Britain's Prince William and his wife Kate, Duchess of Cambridge, leave Westminster Abbey in London, after their wedding ceremony, on April 29, 2011. AFP PHOTO / ODD ANDERSEN (Photo credit should read ODD ANDERSEN/AFP/Getty Images) (credit:Getty Images)
Britain's Prince William and his wife Ka(18 of45)
Britain's Prince William and his wife Kate, Duchess of Cambridge pose for photographs at the West Door of Westminster Abbey in London after their wedding ceremony, on April 29, 2011. AFP PHOTO / BEN STANSALL (Photo credit should read BEN STANSALL/AFP/Getty Images) (credit:Getty Images)
A combo image showing the wedding of Lad(19 of45)
A combo image showing the wedding of Lady Diana, Princess of Wales with Prince Charles of Wales at St Paul Cathedral in London on July 29, 1981 and an image showing Kate Middleton standing at the altar with her husband to be Prince William at Westminster Abbey on April 29, 2011.AFP PHOTO (Photo credit should read STR/AFP/Getty Images) (credit:Getty Images)
Philippa Middleton, sister of Kate Middl(20 of45)
Philippa Middleton, sister of Kate Middleton and Maid of Honour arrives with the bridemaids and page boys at the West Door of Westminster Abbey in London for the wedding her sister to Britain's Prince William, on April 29, 2011. AFP PHOTO / ODD ANDERSEN (Photo credit should read ODD ANDERSEN/AFP/Getty Images) (credit:Getty Images)
Prince William (C) and his best man and(21 of45)
Prince William (C) and his best man and brother Prince Harry (L) are greeted by Receiver General Stephen Lamport (R) as they arrive inside Westminster Abbey on April 29, 2011 in London, where Prince William and Kate Middleton will marry later today. AFP PHOTO/ POOL/ ANTHONY DEVLIN (Photo credit should read Anthony Devlin/AFP/Getty Images) (credit:Getty Images)
Prince William (L) and Kate Middleton (C(22 of45)
Prince William (L) and Kate Middleton (C) sing next to Kate's father Michael Middleton during their wedding at Westminster Abbey, on April 29, 2011 in London. AFP PHOTO / WPA POOL / Dominic Lipinski (Photo credit should read Dominic Lipinski/AFP/Getty Images) (credit:Getty Images)
A combination of five pictures shows Kat(23 of45)
A combination of five pictures shows Kate Middleton arriving at the West Door of Westminster Abbey for her wedding with Britainâs Prince William in London on April 29, 2011. AFP PHOTO (Photo credit should read BEN STANSALL/AFP/Getty Images) (credit:Getty Images)
Prince William (L) and Kate Middleton (C(24 of45)
Prince William (L) and Kate Middleton (C) exchange rings in front of the Archbishop of Canterbury during their wedding at Westminster Abbey, on April 29, 2011 in London. AFP PHOTO / WPA POOL / Dominic Lipinski (Photo credit should read Dominic Lipinski/AFP/Getty Images) (credit:Getty Images)
Britain's Prince William and his wife Ka(25 of45)
Britain's Prince William and his wife Kate, Duchess of Cambridge, come out of Westminster Abbey following their wedding ceremony, in London, on April 29, 2011. AFP PHOTO / CARL DE SOUZA (Photo credit should read CARL DE SOUZA/AFP/Getty Images) (credit:Getty Images)
Britain's Prince William and his wife Ka(26 of45)
Britain's Prince William and his wife Kate, Duchess of Cambridge, wave as they travel in the 1902 State Landau carriage along the Processional Route to Buckingham Palace, in London, on April 29, 2011. AFP PHOTO / ODD ANDERSEN (Photo credit should read ODD ANDERSEN/AFP/Getty Images) (credit:Getty Images)
Prince William (L) and Kate Middleton (C(27 of45)
Prince William (L) and Kate Middleton (C) exchange rings during their wedding at Westminster Abbey, on April 29, 2011 in London. AFP PHOTO / WPA POOL / Dominic Lipinski (Photo credit should read Dominic Lipinski/AFP/Getty Images) (credit:Getty Images)
Britain's Prince William (L) and his wif(28 of45)
Britain's Prince William (L) and his wife Kate, Duchess of Cambridge, followed by Britain's Prince Harry and Maid of Honour Philipa Middleton, leave Westminster Abbey in London, after their wedding ceremony, on April 29, 2011. AFP PHOTO / WPA POOL / KIRSTY WIGGLESWORTH (Photo credit should read KIRSTY WIGGLESWORTH/AFP/Getty Images) (credit:Getty Images)
Bride Kate Middleton (L) walks down the(29 of45)
Bride Kate Middleton (L) walks down the aisle with her father Michael at Westminster Abbey prior to her royal wedding with Prince William in central London on April 29, 2011. AFP PHOTO/ POOL/ ANDREW MILLIGAN (Photo credit should read ANDREW MILLIGAN/AFP/Getty Images) (credit:Getty Images)
Kate Middleton waves as she arrives at t(30 of45)
Kate Middleton waves as she arrives at the West Door of Westminster Abbey in London for her wedding to Britain's Prince William, on April 29, 2011. AFP PHOTO / ODD ANDERSEN (Photo credit should read ODD ANDERSEN/AFP/Getty Images) (credit:Getty Images)
Kate Middleton arrives at the West Door(31 of45)
Kate Middleton arrives at the West Door of Westminster Abbey in London for her wedding to Britain's Prince William, on April 29, 2011. AFP PHOTO / BEN STANSALL (Photo credit should read BEN STANSALL/AFP/Getty Images) (credit:Getty Images)
Kate Middleton accompanied by her father(32 of45)
Kate Middleton accompanied by her father Michael Middleton arrives at the West Door of Westminster Abbey in London for her wedding to Britain's Prince William, on April 29, 2011. AFP PHOTO / ODD ANDERSEN (Photo credit should read ODD ANDERSEN/AFP/Getty Images) (credit:Getty Images)
Kate Middleton waves as she travels in a(33 of45)
Kate Middleton waves as she travels in a Rolls Royce Phantom VI to Westminster Abbey in London for her wedding to Britain's Prince William, on April 29, 2011. AFP PHOTO / WPA POOL /Matthew Lloyd (Photo credit should read Matthew Lloyd/AFP/Getty Images) (credit:Getty Images)
Kate Middleton arrives to the West Door(34 of45)
Kate Middleton arrives to the West Door of Westminster Abbey in London for her wedding to Britain's Prince William, on April 29, 2011. AFP PHOTO / ODD ANDERSEN (Photo credit should read ODD ANDERSEN/AFP/Getty Images) (credit:Getty Images)
Kate Middleton arrives with her sister,(35 of45)
Kate Middleton arrives with her sister, Maid of Honour Philippa Middleton at the West Door of Westminster Abbey in London for her wedding to Britain's Prince William, on April 29, 2011. AFP PHOTO / BEN STANSALL (Photo credit should read BEN STANSALL/AFP/Getty Images) (credit:Getty Images)
Royal Wedding - Carriage Procession To Buckingham Palace And Departures(36 of45)
LONDON, ENGLAND - APRIL 29: Their Royal Highnesses Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge journey by carriage procession to Buckingham Palace following their marriage at Westminster Abbey on April 29, 2011 in London, England. The marriage of the second in line to the British throne was led by the Archbishop of Canterbury and was attended by 1900 guests, including foreign Royal family members and heads of state. Thousands of well-wishers from around the world have also flocked to London to witness the spectacle and pageantry of the Royal Wedding. (Photo by Pascal Le Segretain/Getty Images) (credit:Getty Images)
Royal Wedding - Carriage Procession To Buckingham Palace And Departures(37 of45)
LONDON, ENGLAND - APRIL 29: Their Royal Highnesses Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge journey by carriage procession to Buckingham Palace following their marriage at Westminster Abbey on April 29, 2011 in London, England. The marriage of the second in line to the British throne was led by the Archbishop of Canterbury and was attended by 1900 guests, including foreign Royal family members and heads of state. Thousands of well-wishers from around the world have also flocked to London to witness the spectacle and pageantry of the Royal Wedding. (Photo by Pascal Le Segretain/Getty Images) (credit:Getty Images)
Britain's Prince William kisses his wife(38 of45)
Britain's Prince William kisses his wife Kate, Duchess of Cambridge, on the balcony of Buckingham Palace, after the wedding service, on April 29, 2011, in London. AFP PHOTO / LEON NEAL ALTERNATIVE CROP (Photo credit should read LEON NEAL/AFP/Getty Images) (credit:Getty Images)
Britain's Prince William (L) and his wif(39 of45)
Britain's Prince William (L) and his wife Kate, Duchess of Cambridge, leave Westminster Abbey in London, after their wedding ceremony on April 29, 2011. AFP PHOTO / CARL DE SOUZA (Photo credit should read CARL DE SOUZA/AFP/Getty Images) (credit:Getty Images)
Royal Wedding - Wedding Guests And Party Make Their Way To Westminster Abbey(40 of45)
LONDON, ENGLAND - APRIL 29: Catherine Middleton arrives to attend the Royal Wedding of Prince William to Catherine Middleton at Westminster Abbey on April 29, 2011 in London, England. The marriage of the second in line to the British throne is to be led by the Archbishop of Canterbury and will be attended by 1900 guests, including foreign Royal family members and heads of state. Thousands of well-wishers from around the world have also flocked to London to witness the spectacle and pageantry of the Royal Wedding. (Photo by Pascal Le Segretain/Getty Images) (credit:Getty Images)
Royal Wedding - Carriage Procession To Buckingham Palace And Departures(41 of45)
LONDON, ENGLAND - APRIL 29: HRH Catherine, Duchess of Cambridge exits following her marriage to HRH Prince William, Duke of Cambridge at Westminster Abbey on April 29, 2011 in London, England. The marriage of the second in line to the British throne was led by the Archbishop of Canterbury and was attended by 1900 guests, including foreign Royal family members and heads of state. Thousands of well-wishers from around the world have also flocked to London to witness the spectacle and pageantry of the Royal Wedding. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
Royal Wedding - Carriage Procession To Buckingham Palace And Departures(42 of45)
LONDON, ENGLAND - APRIL 29: TRH Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge smile following their marriage at Westminster Abbey on April 29, 2011 in London, England. The marriage of the second in line to the British throne was led by the Archbishop of Canterbury and was attended by 1900 guests, including foreign Royal family members and heads of state. Thousands of well-wishers from around the world have also flocked to London to witness the spectacle and pageantry of the Royal Wedding. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
Philippa Middleton, sister of Kate Middl(43 of45)
Philippa Middleton, sister of Kate Middleton, and Maid of Honour, arrives at the West Door of Westminster Abbey in London for the wedding of Britain's Prince William and her sister, on April 29, 2011. AFP PHOTO / CARL DE SOUZA (Photo credit should read CARL DE SOUZA/AFP/Getty Images) (credit:Getty Images)
Royal Wedding - Wedding Guests And Party Make Their Way To Westminster Abbey(44 of45)
LONDON, ENGLAND - APRIL 29: Catherine Middleton arrives to attend the Royal Wedding of Prince William to Catherine Middleton at Westminster Abbey on April 29, 2011 in London, England. The marriage of the second in line to the British throne is to be led by the Archbishop of Canterbury and will be attended by 1900 guests, including foreign Royal family members and heads of state. Thousands of well-wishers from around the world have also flocked to London to witness the spectacle and pageantry of the Royal Wedding. (Photo by Dan Kitwood/Getty Images) (credit:Getty Images)
Royal Wedding - The Newlyweds Greet Wellwishers From The Buckingham Palace Balcony(45 of45)
LONDON, ENGLAND - APRIL 29: His Royal Highnesses Prince William Duke of Cambridge drives his wife HRH Catherine Duchess of Cambridge in a blue Aston Martin as they leave Buckingham Palace to Clarence House on April 29, 2011 in London, England. The marriage of the second in line to the British throne was led by the Archbishop of Canterbury and was attended by 1900 guests, including foreign Royal family members and heads of state. Thousands of well-wishers from around the world have also flocked to London to witness the spectacle and pageantry of the Royal Wedding. (Photo by Pascal Le Segretain/Getty Images) (credit:Getty Images)