They Live by Night is a 1948 American film noir, based on Edward Anderson's Depression era novel Thieves Like Us. The film was directed by Nicholas Ray (his first feature film) and starred Farley Granger as "Bowie" Bowers and Cathy O'Donnell as "Keechie" Mobley. The movie is the prototype for the "couple on the run" genre, and is generally seen as the forerunner to the movie Bonnie and Clyde. Robert Altman directed a version of the novel titled Thieves Like Us in 1974.
(Summary from Wikipedia)