Epsom Derby Festival at Epsom Racecourse on June 2, 2018 in Epsom, England.

Queen Elizabeth II attends the Epsom Derby Festival at Epsom Racecourse on June 2, 2018, in Epsom, England.

Queen Elizabeth II attends the Epsom Derby Festival at Epsom Racecourse 2018 in Epsom, England.

Queen Elizabeth II wore a lilac coat and matching hat, topped with a broach and floral arrangement as she attended the Epsom Races 2018

Queen Elizabeth II attends the Epsom Derby Festival at Epsom Racecourse 2018 in Epsom, England.

Queen Elizabeth II attends the Epsom Derby Festival at Epsom Racecourse on June 2, 2018, in Epsom, England.

Queen Elizabeth II in a lilac suit and matching hat, topped with a broach and floral arrangement as she attended the races

Queen Elizabeth II attends the Epsom Derby Festival at Epsom Racecourse 2018 in Epsom, England.

Queen Elizabeth II attends the Epsom Derby Festival at Epsom Racecourse 2018 in Epsom, England.

Queen Elizabeth II attends the Epsom Derby Festival at Epsom Racecourse 2018 in Epsom, England.

Queen Elizabeth II watches the racing at the Epsom Derby Festival at Epsom Racecourse 2018 in Epsom, England.

Queen Elizabeth II watches the racing at the Epsom Derby Festival at Epsom Racecourse 2018 in Epsom, England.

Queen Elizabeth II in a flowery dress as she watches the racing at the Epsom Derby Festival at Epsom Racecourse 2018 in Epsom, England.

Queen Elizabeth II watches the racing at the Epsom Derby Festival at Epsom Racecourse on June 2, 2018, in Epsom, England.

Queen Elizabeth II attends the Epsom Derby Festival at Epsom Racecourse 2018 in Epsom, England.

Princess Haya Bint Al Hussein attends the Epsom Derby Festival at Epsom Racecourse 2018 in Epsom, England.

Queen Elizabeth II attends the Epsom Derby Festival at Epsom Racecourse 2018 in Epsom, England.

Queen Elizabeth II and John Warren attend the Epsom Derby Festival at Epsom Racecourse on June 2, 2018, in Epsom, England.

Princess Alexandra attends the Epsom Derby Festival at Epsom Racecourse 2018 in Epsom, England.

Queen Elizabeth II attends the Epsom Derby Festival at Epsom Racecourse 2018 in Epsom, England.

Queen Elizabeth II attends the Epsom Derby Festival at Epsom Racecourse 2018 in Epsom, England.

 Princess Haya Bint Al Hussein attends the Epsom Derby Festival at Epsom Racecourse on June 2, 2018, in Epsom, England.

Queen Elizabeth II attends the Epsom Derby Festival at Epsom Racecourse 2018 in Epsom, England.

Queen Elizabeth II attends the Epsom Derby Festival at Epsom Racecourse 2018 in Epsom, England.

Princess Haya Bint Al Hussein attends the Epsom Derby Festival at Epsom Racecourse 2018 in Epsom, England.

Queen Elizabeth II attends the Epsom Derby Festival at Epsom Racecourse on June 2, 2018, in Epsom, England.

Queen Elizabeth II and John Warren attend the Epsom Derby Festival at Epsom Racecourse 2018 in Epsom, England.

Queen Elizabeth II attends the Epsom Derby Festival at Epsom Racecourse 2018 in Epsom, England.

Queen Elizabeth II attends the Epsom Derby Festival at Epsom Racecourse 2018 in Epsom, England.

Queen Elizabeth II attends Derby Day of the Investec Derby Festival at Epsom Racecourse on June 2, 2018, in Epsom, England.

Queen Elizabeth II attends Derby Day of the Investec Derby Festival at Epsom Racecourse 2018 in Epsom, England.

Queen Elizabeth II attends Derby Day of the Investec Derby Festival at Epsom Racecourse 2018 in Epsom, England.

Queen Elizabeth II attends Derby Day of the Investec Derby Festival at Epsom Racecourse on June 2, 2018, in Epsom, England.

Queen Elizabeth II attends Derby Day of the Investec Derby Festival at Epsom Racecourse 2018 in Epsom, England.

Queen Elizabeth II attends Derby Day of the Investec Derby Festival at Epsom Racecourse 2018 in Epsom, England.

Queen Elizabeth II attends Derby Day of the Investec Derby Festival at Epsom Racecourse 2018 in Epsom, England.

Queen Elizabeth II attends Derby Day of the Investec Derby Festival at Epsom Racecourse on June 2, 2018, in Epsom, England.

Queen Elizabeth II attends Derby Day of the Investec Derby Festival at Epsom Racecourse 2018 in Epsom, England.

Queen Elizabeth II attends Derby Day of the Investec Derby Festival at Epsom Racecourse on June 2, 2018, in Epsom, England.

(L-R) Queen Elizabeth II and Lady Carolyn Warren attend Derby Day of the Investec Derby Festival at Epsom Racecourse 2018 in Epsom, England.

Princess Alexandra and Lady Susan Hussey (Lady-in-waiting to Queen Elizabeth II) attend Derby Day of the Investec Derby Festival at Epsom Racecourse on June 2, 2018, in Epsom, England.

Princess Alexandra attends Derby Day of the Investec Derby Festival at Epsom Racecourse 2018 in Epsom, England.

Princess Alexandra attends Derby Day of the Investec Derby Festival at Epsom Racecourse 2018 in Epsom, England.

Princess Alexandra attends Derby Day of the Investec Derby Festival at Epsom Racecourse on June 2, 2018, in Epsom, England.

Queen Elizabeth II looks on in a flowery dress from a balcony at the Epsom races on Derby day. 

The Majesty Queen Elizabeth II watches the races with racing manager John Warren during derby day of the 2018 Investec Derby Festival at Epsom Downs Racecourse 2018

Queen Elizabeth II watches the races with John Warren, who manages Her Majesty's horses, at the Epsom Derby on June 2, 2018

John Warren and Queen Elizabeth II share a laugh at Derby day at Epsom races, one of the biggest races of the year 2018

Fleets of photographers crowd to get a shot of The Majesty Queen Elizabeth on left as she walks the racecourse with Julia Budd

(L-R) Queen Elizabeth II wore a lilac coat and matching hat, topped with a broach and floral arrangement and is greeted by Julia Budd, the director of Epsom Downs racecourse, who wears a pale blue coat and nude shoe

Queen Elizabeth II arrives at The Queen's Stand ready for the race day, she is accompanied by Julia Budd, the director of Epsom Downs racecourse

Queen Elizabeth II arrives at the races in a purple Bentley. She is one of 150,000 attendees descending of the Surrey racecourse this weekend, June 2, 2018

Queen Elizabeth meets attendees at the racecourse as they bask in the 71F Surrey heat on Saturday afternoon, June 2, 2018. She was accompanied by Princess Alexandra, the Hon. Lady Ogilvy who wears pale pink skirt suit, opted for a boat hat and teamed with a pair of black suede shoes.

Queen Elizabeth II wore a lilac coat and matching hat, topped with a broach and floral arrangement and is greeted by Julia Budd, the director of Epsom Downs racecourse, who wears a pale blue coat and nude shoe

Racecourse director of Epso Downs Julia Budd courtesies to Queen Elizabeth II as she arrives in a Bentley to the biggest flat race of the year 2018

Her Majesty Queen Elizabeth II wore a lilac suit and matching hat, topped with a broach and floral arrangement as she attended the races