The film was based on Murray Burnett and Joan Alison's unproduced play Everybody Comes to Rick's. The Warner Bros. story analyst who read the play, Stephen Karnot, called it (approvingly) "sophisticated hokum" an… See more

Although an initial filming date was selected for April 10, 1942, delays led to production starting on May 25. Filming was completed on August 3. It went $75,000 over budget for a total cost of $1,039,000 (equivalent to $15,324,00… See more

The music was written by Max Steiner, who wrote scores for King Kong and Gone with the Wind. The song "As Time Goes By" by Herman Hupfeld had been part of the story from the original play; Steiner wanted to write his o… See more