Britain's Prince William (centre R) and his wife Catherine (centre L) walk out onto the field with All Blacks captain Richie McCaw (R) during a children's rugby game at Forsyth Barr Stadium in Dunedin on April 13, 2014. William, Kate and their son Prince George are on a three-week tour of New Zealand and Australia.  AFP PHOTO / MARTY MELVILLE        (Photo credit should read Marty Melville/AFP/Getty Images)