The Duchess of Cambridge is reportedly successfully breastfeeding newborn Prince George.

The 31-year-old, who is currently staying with her parents in Bucklebury, Berkshire, was photographed wearing a dress designed especially for breastfeeding mothers as she left Kensington Palace on Wednesday.

The £50 dress, by maternity wear specialists Seraphine, has sold out online and there is now a four-week waiting list for it.

william kate baby

Bye bye: The Duchess of Cambridge wore a maternity dress for breastfeeding mothers as she waved farewell to well-wishers at Kensington Palace last Wednesday

kate william baby

An unnamed source told The Mirror: “It would be fair to say that Prince George has a healthy appetite. He is a very hungry little boy.

“I gather there were some difficulties at first – there often can be, as new mums get a little tense.

“But after some help from the midwife, they both caught on very quickly. As far as I can tell, Kate finds it very relaxing and George is just like any other little baby.”

She added: "But don't expect Kate to be photographed breastfeeding. She does not want to become a pin-up for the breastfeeding lobby."

seraphine

The £50 maternity dress for breastfeeding mothers has sold out

Breast milk contains nutrients, as well as hormones and disease-fighting compounds not present in formula milk.

The little boy was born in the private Lindo wing at St Mary's Hospital in London last Monday. His parents showed him off to the world just a day later, speaking of the "very emotional" event of his birth.

kate william

Kate and William described their new son as 'very special'

Holding his son, William walked forward with his wife to answer a few questions from waiting journalists.

"He's got a good pair of lungs on him, that's for sure," he joked. "He's a big boy, he's quite heavy."

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  • The Duke And Duchess Of Cambridge Leave The Lindo Wing With Their Newborn Son

    LONDON, ENGLAND - JULY 23: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge depart The Lindo Wing with their newborn son at St Mary's Hospital on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge. (Photo by Peter Macdiarmid/Getty Images)

  • The Duke And Duchess Of Cambridge Leave The Lindo Wing With Their Newborn Son

    LONDON, ENGLAND - JULY 23: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge depart The Lindo Wing with their newborn son at St Mary's Hospital on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge. (Photo by Chris Jackson/Getty Images)

  • The Duke And Duchess Of Cambridge Leave The Lindo Wing With Their Newborn Son

    LONDON, ENGLAND - JULY 23: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge, depart The Lindo Wing with their newborn son at St Mary's Hospital on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge. (Photo by Scott Heavey/Getty Images)

  • The Duke And Duchess Of Cambridge Leave The Lindo Wing With Their Newborn Son

    LONDON, ENGLAND - JULY 23: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge depart The Lindo Wing with their newborn son at St Mary's Hospital on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge. (Photo by Chris Jackson/Getty Images)

  • The Duke And Duchess Of Cambridge Leave The Lindo Wing With Their Newborn Son

    LONDON, ENGLAND - JULY 23: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge hold their newborn son outside The Lindo Wing at St Mary's Hospital on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge.  (Photo by Peter Macdiarmid/Getty Images)

  • The Duke And Duchess Of Cambridge Leave The Lindo Wing With Their Newborn Son

    LONDON, ENGLAND - JULY 23: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge, depart The Lindo Wing with their newborn son at St Mary's Hospital on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge. (Photo by Chris Jackson/Getty Images)

  • The Duke And Duchess Of Cambridge Leave The Lindo Wing With Their Newborn Son

    LONDON, ENGLAND - JULY 23: Crowds of well wishers take photographs as Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge, depart The Lindo Wing with their newborn son at St Mary's Hospital on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge.  (Photo by Peter Macdiarmid/Getty Images)

  • The Duke And Duchess Of Cambridge Leave The Lindo Wing With Their Newborn Son

    LONDON, ENGLAND - JULY 23: Crowds of well wishers take photographs as Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge, depart The Lindo Wing with their newborn son at St Mary's Hospital on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge.  (Photo by Peter Macdiarmid/Getty Images)

  • The Duke And Duchess Of Cambridge Leave The Lindo Wing With Their Newborn Son

    LONDON, ENGLAND - JULY 23: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge, depart The Lindo Wing with their newborn son at St Mary's Hospital on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge. (Photo by Scott Heavey/Getty Images)

  • The Duke And Duchess Of Cambridge Leave The Lindo Wing With Their Newborn Son

    LONDON, ENGLAND - JULY 23: Crowds of well wishers take photographs as Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge, depart The Lindo Wing with their newborn son at St Mary's Hospital on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge.  (Photo by Peter Macdiarmid/Getty Images)

  • The Duke And Duchess Of Cambridge Leave The Lindo Wing With Their Newborn Son

    LONDON, ENGLAND - JULY 23: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge, depart The Lindo Wing with their newborn son at St Mary's Hospital on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge. (Photo by Scott Heavey/Getty Images)

  • The Duke And Duchess Of Cambridge Leave The Lindo Wing With Their Newborn Son

    LONDON, ENGLAND - JULY 23: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge leave the Lindo Wing of St Mary's Hospital with their newborn son on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge. (Photo by Oli Scarff/Getty Images)

  • The Duke And Duchess Of Cambridge Leave The Lindo Wing With Their Newborn Son

    LONDON, ENGLAND - JULY 23: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge leave the Lindo Wing of St Mary's Hospital with their newborn son on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge. (Photo by Oli Scarff/Getty Images)

  • The Duke And Duchess Of Cambridge Leave The Lindo Wing With Their Newborn Son

    LONDON, ENGLAND - JULY 23: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge leave the Lindo Wing of St Mary's Hospital with their newborn son on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge. (Photo by Oli Scarff/Getty Images)

  • The Duke And Duchess Of Cambridge Leave The Lindo Wing With Their Newborn Son

    LONDON, ENGLAND - JULY 23: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge, depart The Lindo Wing with their newborn son at St Mary's Hospital on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge. (Photo by Scott Heavey/Getty Images)

  • The Duke And Duchess Of Cambridge Leave The Lindo Wing With Their Newborn Son

    LONDON, ENGLAND - JULY 23: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge leave the Lindo Wing of St Mary's Hospital with their newborn son on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge. (Photo by Oli Scarff/Getty Images)

  • The Duke And Duchess Of Cambridge Leave The Lindo Wing With Their Newborn Son

    LONDON, ENGLAND - JULY 23: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge, depart The Lindo Wing with their newborn son at St Mary's Hospital on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge. (Photo by Scott Heavey/Getty Images)

  • The Duke And Duchess Of Cambridge Leave The Lindo Wing With Their Newborn Son

    LONDON, ENGLAND - JULY 23: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge, depart The Lindo Wing with their newborn son at St Mary's Hospital on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge. (Photo by Scott Heavey/Getty Images)

  • The Duke And Duchess Of Cambridge Leave The Lindo Wing With Their Newborn Son

    LONDON, ENGLAND - JULY 23: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge, depart The Lindo Wing with their newborn son at St Mary's Hospital on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge. (Photo by Chris Jackson/Getty Images)

  • The Duke And Duchess Of Cambridge Leave The Lindo Wing With Their Newborn Son

    LONDON, ENGLAND - JULY 23: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge depart The Lindo Wing with their newborn son at St Mary's Hospital on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge. (Photo by Chris Jackson/Getty Images)

  • The Duke And Duchess Of Cambridge Leave The Lindo Wing With Their Newborn Son

    LONDON, ENGLAND - JULY 23: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge depart The Lindo Wing with their newborn son at St Mary's Hospital on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge. (Photo by Chris Jackson/Getty Images)

  • The Duke And Duchess Of Cambridge Leave The Lindo Wing With Their Newborn Son

    LONDON, ENGLAND - JULY 23: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge, depart The Lindo Wing with their newborn son at St Mary's Hospital on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge. (Photo by Scott Heavey/Getty Images)

  • The Duke And Duchess Of Cambridge Leave The Lindo Wing With Their Newborn Son

    LONDON, ENGLAND - JULY 23: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge, depart The Lindo Wing with their newborn son at St Mary's Hospital on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge. (Photo by Scott Heavey/Getty Images)

  • The Duke And Duchess Of Cambridge Leave The Lindo Wing With Their Newborn Son

    LONDON, ENGLAND - JULY 24: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge, depart The Lindo Wing with their newborn son at St Mary's Hospital on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge.  (Photo by Peter Macdiarmid/Getty Images)

  • The Duke And Duchess Of Cambridge Leave The Lindo Wing With Their Newborn Son

    LONDON, ENGLAND - JULY 24: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge, depart The Lindo Wing with their newborn son at St Mary's Hospital on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge.  (Photo by Peter Macdiarmid/Getty Images)

  • The Duke And Duchess Of Cambridge Leave The Lindo Wing With Their Newborn Son

    LONDON, ENGLAND - JULY 23: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge, depart The Lindo Wing with their newborn son at St Mary's Hospital on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge. (Photo by Chris Jackson/Getty Images)

  • Royal baby born

    The safe hands of the Duchess of Cambridge with her son who was born yesterday, leave the Lindo Wing of St Mary's Hospital in west London.

  • Royal Baby

    Prince William and Kate Middleton, The Duke and Duchess of Cambridge at the Lindo Wing of St Mary's Hospital with their new born baby boy, Paddington, London.

  • Royal baby born

    The Duke and Duchess of Cambridge leave the Lindo Wing of St Mary's Hospital in London, with their newborn son. PRESS ASSOCIATION Photo. Picture date: Tuesday July 23, 2013. See PA story ROYAL Baby. Photo credit should read: Jonathan Brady/PA Wire

  • Royal baby born

    The Duke and Duchess of Cambridge leave the Lindo Wing of St Mary's Hospital in London, with their newborn son.

  • Royal baby born

    The Duke and Duchess of Cambridge leave the Lindo Wing of St Mary's Hospital in London, with their newborn son.

  • Royal baby born

    The Duke and Duchess of Cambridge leave the Lindo Wing of St Mary's Hospital in London, with their newborn son.

  • Royal baby born

    The Duke and Duchess of Cambridge leave the Lindo Wing of St Mary's Hospital in London, with their newborn son.

  • Royal baby born

    The Duke and Duchess of Cambridge leave the Lindo Wing of St Mary's Hospital in London, with their newborn son.

  • Britain's Prince William and Kate, Duchess of Cambridge hold the Prince of Cambridge, Tuesday July 23, 2013, as they pose for photographers outside St. Mary's Hospital exclusive Lindo Wing in London where the Duchess gave birth on Monday July 22. The Royal couple are expected to head to London’s Kensington Palace from the hospital with their newly born son, the third in line to the British throne. (AP Photo/Lefteris Pitarakis)

  • Kate, Duchess of Cambridge holds the Prince of Cambridge, Tuesday July 23, 2013, as they pose for photographers outside St. Mary's Hospital exclusive Lindo Wing in London where the Duchess gave birth on Monday July 22. The Royal couple are expected to head to London’s Kensington Palace from the hospital with their newly born son, the third in line to the British throne. (AP Photo/Alastair Grant)

  • Britain's Prince William and Kate, Duchess of Cambridge hold the Prince of Cambridge, Tuesday July 23, 2013, as they pose for photographers outside St. Mary's Hospital exclusive Lindo Wing in London where the Duchess gave birth on Monday July 22. The Royal couple are expected to head to London’s Kensington Palace from the hospital with their newly born son, the third in line to the British throne. (AP Photo/Lefteris Pitarakis)

  • Britain's Prince William and Kate, Duchess of Cambridge hold the Prince of Cambridge, Tuesday July 23, 2013, as they pose for photographers outside St. Mary's Hospital exclusive Lindo Wing in London where the Duchess gave birth on Monday July 22. The Royal couple are expected to head to London’s Kensington Palace from the hospital with their newly born son, the third in line to the British throne. (AP Photo/Lefteris Pitarakis)

  • Royal Baby

    The Duchess of Cambridge, Prince William and their newborn son pictured outside the Lindo Wing at St Mary's Hospital, London.

  • Royal baby born

    The Duke and Duchess of Cambridge leave the Lindo Wing of St Mary's Hospital in London, with their newborn son.

  • Royal baby born

    The Duke and Duchess of Cambridge leave the Lindo Wing of St Mary's Hospital in London, with their newborn son.

  • Royal baby born

    The Duke and Duchess of Cambridge leave the Lindo Wing of St Mary's Hospital in London, with their newborn son.

  • Royal Baby

    The Duchess of Cambridge, Prince William and their newborn son pictured outside the Lindo Wing at St Mary's Hospital, London.

  • Royal Baby

    The Duchess of Cambridge, Prince William and their newborn son pictured outside the Lindo Wing at St Mary's Hospital, London.

  • Royal baby born

    The Duke and Duchess of Cambridge leave the Lindo Wing of St Mary's Hospital in London, with their newborn son.

  • Royal baby born

    The Duke and Duchess of Cambridge leave the Lindo Wing of St Mary's Hospital in London, with their newborn son.

  • Britain's Prince William and Kate, Duchess of Cambridge hold the Prince of Cambridge, Tuesday July 23, 2013, as they pose for photographers outside St. Mary's Hospital exclusive Lindo Wing in London where the Duchess gave birth on Monday July 22. The Royal couple are expected to head to London’s Kensington Palace from the hospital with their newly born son, the third in line to the British throne.

  • Royal baby born

    The Prince of Wales and Duchess of Cornwall leave the Lindo Wing of St Mary's Hospital in London, after he met his new grandson.

  • Royal baby born

    The Prince of Wales and Duchess of Cornwall leave the Lindo Wing of St Mary's Hospital in London, after he met his new grandson.

  • Royal baby born

    The Prince of Wales and Duchess of Cornwall leave the Lindo Wing of St Mary's Hospital in London, after he met his new grandson.

  • Royal baby born

    The Prince of Wales and Duchess of Cornwall arrive at the Lindo Wing of St Mary's Hospital in London, to meet his new grandson.