As the director of classic thrillers like Rear Window, Vertigo, North by Northwest, and Psycho, Alfred Hitchcock is, of course, best known for his work behind the camera. He created 50 feature films across six decades, and invented seminal camera techniques still duplicated today. But Hitchcock was also something of a ham on the other side of the lens: He had memorable cameos in 37 of his own films, often jumped into a scene to show his actors how things should be done, and seemed comfortable to share his private life (even an attempt to lose weight) with the public.