North by Northwest (1959) - Hitchcock's cameo
From Alfred Hitchcock Wiki
Hitchcock's cameo in North by Northwest (1959) occurs about 2 minutes into the film.
During the opening title sequence, Hitchcock just misses catching a bus.
About 45 minutes into the film, there's a very lugubrious lady on the train... could it be a secret cameo?
YouTube Video
Film Frames
Selection of film frames of Alfred Hitchcock in North by Northwest (1959) (click image to view larger version)...