After announcing their engagement at the State Rooms of St James's Palace in London, Prince William and Kate Middleton are returning back to their home in Anglesey, Wales, has learned.

William, 28, a Royal Air Force search-and-rescue pilot, also is set to return to his RAF Valley military base on Anglesey island in North Wales Thursday.

PHOTOS: Prince William and Kate's eight-year-romance

Though they aren't set to wed until spring or summer 2011, the two "are pretty much living like man and wife," Katie Nicholl -- author of William and Harry: Behind the Palace Walls and royal correspondent for the Mail on Sunday -- recently told Us Weekly.

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