Question: What is the birthdate of this American film director, screenwriter, author, actor, stand up comedian, journalist, visual artist, and art collector, who was a lifelong friend and collaborator of Harris Glenn Milstead? 
Sentence (from "Willis Hall"): His best-known work was a stage adaptation of the 1959 novel "Billy Liar" (1960), co-written with the book's author and Hall's lifelong friend and collaborator Keith Waterhouse.
Relevant evidence: No