The Duke And Duchess Of Cambridge Tour Australia And New Zealand - Day 18 [Getty Images]

CANBERRA, ACT - APRIL 24: (NO UK SALES FOR 28 DAYS) Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge visit the National Arboretum on April 24, 2014 in Canberra, 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 Pool/Samir Hussein/WireImage)

WireImage Samir Hussein