AYERS ROCK, AUSTRALIA - APRIL 22:  Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge pose in front of Uluru, also known as Ayers Rock, on April 22, 2014 in Ayers Rock, Australia. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Phil Noble - WPA Pool/Getty Images)