File photo dated 09/06/11 of2011 the Duke and Duchess of Cambridge arrive at the 10th annual ARK (Absolute Return for Kids) Gala Dinner, at Kensington Palace, in Kensington, London. PRESS ASSOCIATION Photo. Issue date: Wednesday June 20, 2012. Prince William was born at St Mary’s Hospital, London on June 21, 1982. He will celebrate his 30th birthday this week. See PA story ROYAL William. Photo credit should read: Dominic Lipinski/PA Wire