What's the origin of the phrase 'Play it again Sam'? - Bogart's supposed line from Casablanca.
This is well-known as one of the most widely misquoted lines from films.
The actual line in the film is 'Play it, Sam'. Something approaching 'Play it again, Sam' is first said in the film by Ilsa Lund (Ingrid Bergman) in an exchange with the piano player 'Sam' (Dooley Wilson):
Ilsa: Play it once, Sam. For old times' sake.
Sam: I don't know what you mean, Miss Ilsa.
Ilsa: Play it, Sam. Play "As Time Goes By."
Sam: Oh, I can't remember it, Miss Ilsa. I'm a little rusty on it.
Ilsa: I'll hum it for you. Da-dy-da-dy-da-dum, da-dy-da-dee-da-dum...
Ilsa: Sing it, Sam.