The monarch turned 90 on April 21, but party organisers decided to add the celebration to the end of the annual Royal Windsor Horse Show, which she has not missed since she won a cup there in 1944.
The 900 performing horses will stage a re-enactment of the Queen's life story, with set pieces from her birth through to World War II, her marriage and coronation, and her 64-year reign, 'The Sunday Times' reported.
The extravaganza, to be screened live on British TV on Sunday evening, will also include music from Kylie Minogue and appearances by British actors Helen Mirren and Damian Lewis.
The closing scenes will feature one of the Queen's show horses, Barber's Shop,a thoroughbred that won its category at the show last week.
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The celebration, funded by sponsors, is expected to produce a 1 million pound surplus, which will go to various charities supported by the monarch.
Rare family photographs has also been released to mark the celebration.
In one photo, seen publicly for the first time, shows a young, smiling, future Queen and then Princess Elizabeth with her sister, Margaret, and their father, George VI, each holding one of her beloved corgi dogs.
In a third she is seen looking intently as a bird rests on her arm.