Top comedian and children's author David Walliams says swimming the English Channel for charity has been the best moment of his life so far.
He's been chatting to Hayley to face some of the many questions YOU wanted the answers to.
David - who asked a few questions himself too! - also told us whether he'd rather be a professional swimmer instead of a comedian, if he could turn back time.
And he had time to let us in on the secrets of his new book, Billionaire Boy - about a rich boy who just wants a normal life...