National Service Of Thanksgiving To Celebrate The Queen's 90th Birthday [Getty Images]

LONDON, ENGLAND - JUNE 10: Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge attend a National Service of Thanksgiving as part of the 90th birthday celebrations for The Queen at St Paul's Cathedral on June 10, 2016 in London, England. (Photo by Zak Hussein - Corbis/Corbis via Getty Images)

Corbis Entertainment Zak Hussein - Corbis