The Duke And Duchess Of Cambridge Tour Australia And New Zealand - Day 10 [Getty Images]

SYDNEY, AUSTRALIA - APRIL 16: Catherine, Duchess of Cambridge and Prince George of Cambridge arrive at Sydney Airport on a Australian Airforce 737 aircraft on April 16, 2014 in Sydney, 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 Samir Hussein/WireImage)

WireImage Samir Hussein