The Queen's life was celebrated with a spectacular show featuring stars of stage and screen who performed in honour of her 90 years on Sunday evening.
In the grounds of Windsor Castle - said to be the monarch's favourite home - the Queen's celebration was marked with majestic displays of famous horse troupes, both military and civilian, from across the globe and other performances featuring four-legged animals.
The monarch, who is known for her love of horses, was joined in the royal box by the Duke of Edinburgh, the Prince of Wales and Duchess of Cornwall, the Duke and Duchess of Cambridge and Prince Harry, as well as a number of minor royals.
Here are 20 compelling photos of the Queen enjoying her birthday treat.
Among the famous faces who performed in honour of the Queen were Kylie Minogue, Dame Helen Mirren and Dame Shirley Bassey, with Geordie duo Ant and Dec hosting the two-hour show, which was shown live on ITV.
The Queen celebrated her 90th birthday on April 21, and Charles, patron of the celebrations, wished his mother "the happiest of very special birthdays", writing in the official programme to mark the event, the culmination of the annual Windsor Horse Show, according to the Press Association.
Dec told the 6,000 spectators in the stands: "Her life has spanned 10 decades and historic milestones include one world war, two coronations, man landing on the moon, the dawn of the new millennium, two London Olympic Games and of course 287 Bush Tucker Trials."
Gary Barlow kicked off the entertainment with a belting performance of Something About This Night.
Famous actors narrated the historic moments from the Queen's life, starting with Downton Abbey star Jim Carter, who covered the monarch's childhood years and introduced his wife Imelda Staunton, who performed a song.
Dame Helen took the audience through the monarch's war years and how the nation fought against Nazi tyranny.
The actress went on to describe the young Queen's coronation on June 2 1953 and at the end of the sequence mezzo-soprano Katherine Jenkins gave a rousing rendition of I Vow To Thee My Country.
Australian pop queen Kylie, also sang a version of her song I Believe In You, while Jean-Francois Pignon, introduced as the horse whisperer of France, enthralled the spectators with his command of a group of horses including a Shetland pony.
All eyes were on the Queen, who wore a sea-green dress with a lace overlay and a matching jacket by her personal assistant and dresser Angela Kelly. On her shoulder she wore a turquoise diamond surround brooch.
A major part of the Queen's life has been her role as head of the Commonwealth - the 53-nation organisation know as the family of nations.
Actor Damian Lewis told the crowds the Queen's "commitment and dedication to it is immense".
Military bands from across the Commonwealth performed but the New Zealand Army Band stole this part of the show playing Vangelis' theme from the film Chariots Of Fire, which had the spectators laughing as two of the band ran in slow motion.
The finale saw all the acts - from countries as diverse as Azerbaijan and Fiji - assemble in the main arena for the closing moments when a birthday cake was brought before the crowds.
Dame Shirley Bassey sang the James Bond theme Diamonds Are Forever, before the Happy Birthday song was played, followed by the National Anthem.
Dec summed up the feelings of the crowds when he told the Queen: "Congratulations to you Ma'am on a remarkable milestone - 90 magnificent years - as a princess and a truly inspirational monarch."