The Queen has had a lifelong passion for horses and horse racing which is an interest she shared with her mother - whose own horses won hundreds of races.
As an owner and breeder of thoroughbreds, the Queen has also enjoyed success herself and has won four of the five classic flat races: 1,000 Guineas Stakes, 2,000 Guineas Stakes, Epsom Oaks, and St. Ledger Stakes.
Her first classic victory was in 1958, when Pall Mall won the 2,000 Guineas at Newmarket.
Every year, she attends the Derby at Epsom, one of the classic flat races in Britain, and the Summer Race Meeting at Ascot, which has been a Royal occasion since 1911.
Not even the pomp, pageantry and excitement of her Coronation in 1953 could keep her away, just four days later, the Queen attended the Derby.
Shortly after that she scored a win in the Royal Hunt Cup at Royal Ascot.
The Queen's horses have won at Royal Ascot on a number of occasions and in 1954 she achieved a double when Landau won the Rous Memorial Stakes and a stallion called Aureole won the Hardwicke Stakes.
The Queen biggest success to date was her horse Dunfermline winning the Oaks and the St Leger in her Silver Jubilee year in 1977.
The Derby is the one flat classic she has never won. Though she did come close in 2011, when her horse Carlton House finished third.
The Queen was pictured looking disappointed the race favourite lost out to Pour Moi at Epsom Downs Racecourse.
But watching her horses compete often makes the Queen smile as the picture below illustrates.
In May, the Queen attended an equine pageant at Windsor Castle featuring 550 horses from around the world, celebrating more than 250 Commonwealth and state visits made during her 60-year reign.
The Queen was also given a bridle from The Worshipful Company of Loriners at the show.
It is just one of many horse-related gifts the Queen has been given over the years including a horse from the Royal Canadian Mounted Police.
This year, the Queen attended the Epsom Derby horse race at Epsom racecourse England at the start of a four-day Diamond Jubilee celebration to mark the 60th anniversary of her accession to the throne.