Horse Racing - Royal Ascot - Ascot Racecourse, Ascot, Britain - June 19, 2018 Meghan, the Duchess of Sussex and Britain's Prince Harry.

Horse Racing - Royal Ascot - Ascot Racecourse, Ascot, Britain - June 19, 2018 General view of racegoer's hat.

Horse Racing - Royal Ascot - Ascot Racecourse, Ascot, Britain - June 19, 2018 Racegoers wearing a hat.

Horse Racing - Royal Ascot - Ascot Racecourse, Ascot, Britain - June 19, 2018 Hamdan bin Mohammed Al Maktoum holds a trophy as Princesses Anne looks.

Horse Racing - Royal Ascot - Ascot Racecourse, Ascot, Britain - June 19, 2018 Sheikh Mohammed bin Rashid al-Maktoum, Prime Minister and Vice-President of the United Arab Emirates Action Images via Reuters/Paul Childs

Horse Racing - Royal Ascot - Ascot Racecourse, Ascot, Britain - June 19, 2018 Britain's Queen Elizabeth and Princesses Anne arrive at Ascot racecourse.

Horse Racing - Royal Ascot - Ascot Racecourse, Ascot, Britain - June 19, 2018 Britain's Queen Elizabeth, Racing Advisor John Warren and Sophie, Countess of Wessex during Royal Ascot.

Horse Racing - Royal Ascot - Ascot Racecourse, Ascot, Britain - June 19, 2018 Monarchs Glen ridden by Frankie Dettori in action as he wins the 5.35 Wolferton Stakes.

Horse Racing - Royal Ascot - Ascot Racecourse, Ascot, Britain - June 19, 2018 General view during the 5.00 Ascot Stakes.

Horse Racing - Royal Ascot - Ascot Racecourse, Ascot, Britain - June 19, 2018 Britain's Prince Harry and Meghan, the Duchess of Sussex during a trophy presentation.

Horse Racing - Royal Ascot - Ascot Racecourse, Ascot, Britain - June 19, 2018 Without Parole ridden by Frankie Dettori in action as he wins the 4.20 St James's Palace Stakes Action Images via Reuters/Andrew Boyers.

Horse Racing - Royal Ascot - Ascot Racecourse, Ascot, Britain - June 19, 2018 William Buick leads Blue Point as he celebrates after winning the 3:40 King's Stand Stakes.

Horse Racing - Royal Ascot - Ascot Racecourse, Ascot, Britain - June 19, 2018 Charles, Prince of Wales, Camilla, Duchess of Cornwall, Britain's Prince Harry and Meghan, the Duchess of Sussex arrive at Ascot racecourse.

Horse Racing - Royal Ascot - Ascot Racecourse, Ascot, Britain - June 19, 2018 Britain's Queen Elizabeth and Princesses Anne arrive at Ascot racecourse.

Horse Racing - Royal Ascot - Ascot Racecourse, Ascot, Britain - June 19, 2018 Racegoer looks through Binoculars.

Horse Racing - Royal Ascot - Ascot Racecourse, Ascot, Britain - June 19, 2018 Princesses Anne during Royal Ascot.

Horse Racing - Royal Ascot - Ascot Racecourse, Ascot, Britain - June 19, 2018 Calyx ridden by Frankie Dettori in action during the 3.05 Coventry Stakes.

Horse Racing - Royal Ascot - Ascot Racecourse, Ascot, Britain - June 19, 2018 Without Parole ridden by Frankie Dettori in action as he wins the 4.20 St James's Palace Stakes.

Horse Racing - Royal Ascot - Ascot Racecourse, Ascot, Britain - June 19, 2018 Frankie Dettori jumps off Without Parole as he celebrates winning the 4.20 St James's Palace Stakes.