Prince William, girlfriend celebrate his flying success with West End show

Prince William and girlfriend Kate Middleton reportedly celebrated the royal's passing of his flying exams with a West End show.

The 27-year-old second in line to the British throne was seen taking Middleton for award-winning production War Horse.

The couple appeared to be all loved-up as they watched the play about World War One, reports the News of the World.

William has been honing his skills to fly choppers as a search and rescue pilot in the Royal Air Force.

He will be taught to use his new skills to fly Sea King helicopters as the next stage of his training.