Britain's Prince William (L) and his wife Catherine, the Duchess of Cambridge, pose in front of the Three Sisters rock formation in the Blue Mountains during a tour of Echo Point in Katoomba, west of Sydney, on April 17, 2014. Prince William, his wife Kate and their son Prince George are on a three-week tour of New Zealand and Australia. AFP PHOTO / POOL / Rick Rycroft (Photo credit should read RICK RYCROFT/AFP/Getty Images)
