WINDSOR, ENGLAND - APRIL 16: Catherine, Duchess of Cambridge performs a curtsy to Queen Elizabeth II as she attends Easter Day Service with Prince William, Duke of Cambridge and Princess Beatrice of York at St George's Chapel on April 16, 2017 in Windsor, England. (Photo by Samir Hussein/Samir Hussein/WireImage)

WINDSOR, ENGLAND - APRIL 16:  Catherine, Duchess of Cambridge performs a curtsy to Queen Elizabeth II as she attends Easter Day Service with Prince William, Duke of Cambridge and Princess Beatrice of York at St George's Chapel on April 16, 2017 in Windsor, England.  (Photo by Samir Hussein/Samir Hussein/WireImage)