Britain's Catherine, Duchess of Cambridge (L) and Britain's Prince William, Duke of Cambridge, attend day one of the Royal Ascot horse racing meet, in Ascot, west of London, on June 20, 2017.
The five-day meeting is one of the highlights of the horse racing calendar. Horse racing has been held at the famous Berkshire course since 1711 and tradition is a hallmark of the meeting. Top hats and tails remain compulsory in parts of the course while a daily procession of horse-drawn carriages brings the Queen to the course. / AFP PHOTO / Daniel LEAL-OLIVAS (Photo credit should read DANIEL LEAL-OLIVAS/AFP/Getty Images)