The first pairing of Humphrey Bogart and Lauren Bacall. It's the only film ever made that is based on a novel by one Nobel Prize-winning author (Ernest Hemingway), and adapted for the screen by another Nobel Prize-winning author (William Faulkner). Consequently, it has enough memorable lines of dialogues for a dozens of films. The classic lines:
Slim: Who was the girl, Steve?
Steve: Who was what girl?
Slim: The one who left you with such a high opinion of women.
Slim: I'm hard to get, Steve. All you have to do is ask me.
Slim: You know you don't have to act with me, Steve. You don't have to say anything, and you don't have to do anything. Not a thing. Oh, maybe just whistle. You know how to whistle, don't you, Steve? You just put your lips together and... blow.