In which film did Humphrey Bogart and Lauren Bacall first star together?

To Have and Have Not is a 1944 American romance-war-adventure film directed by Howard Hawks. The film stars Humphrey Bogart, Walter Brennan and Lauren Bacall in her film debut. Although it is nominally based on the novel of the same name by Ernest Hemingway, the story was extensively altered for the film.

Bogart's breakthrough as a leading man came in 1941 with High Sierra and The Maltese Falcon. The next year, his performance in Casablanca (1943; Oscar nomination) raised him to the peak of his profession and, at the same time, cemented his trademark film persona, that of the hard-boiled cynic who ultimately shows his noble side. Other successes followed, including To Have and Have Not (1944).

Bacall began her career as a model, before making her debut as a leading lady with Humphrey Bogart in the film To Have and Have Not in 1944. She continued in the film noir genre with appearances with Bogart in The Big Sleep (1946), Dark Passage (1947), and Key Largo (1948).