The Big Sleep (1946)
The Big Sleep is a 1946 film noir directed by Howard Hawks, the first film version of Raymond Chandler's 1939 novel of the same name. The movie stars Humphrey Bogart as detective Philip Marlowe and Lauren Bacall as the female lead in a story about the "process of a criminal investigation, not its results." William Faulkner, Leigh Brackett, and Jules Furthman co-wrote the screenplay.
More at Wikipedia.