Before he was a lady or a judge on Britain's Got Talent, David Walliams was just another schoolboy with a dream. Tonight he's looking back at a photograph taken when he was just 11-yeard-old, and hoping to reunite the cast of his first ever play, a school production of All The King's Men. He says it set him on the road to stardom, but what has happened to his classmates over the last 30 years? Guess he'll just have to track them down and find out...