Humphrey Bogart, Ingrid Bergman, William Claude Rains, Hans Walter Conrad Veidt and Sydney Hughes Greenstreet all had acting experience before Casablanca, and these were the main actors.

The Maltese Falcon, Gaslight and Intermezzo were some films that some stars had previewed in before.

Warner Bros. convinced the Director of Casablanca, Hal. B Wallis to purchase film rights. some actors, such as Claude Rains, signed a long term contract to Warner Bros.

Ingrid Bergman was casted for her well known beauty, and Humphrey Bogart was well known as playing gangster roles. Paul Henreid was anti nazi as he was half jewish. Both men were also casted for their attractiveness. Conrad Veidt was anti fascist and was casted for his authentic accent.