Humphrey Bogart was already a star before Casablanca some of his previous films were Across the Pacific, The Big Shot, All Through the Night, and the maltease falcon Humphrey’s relationship with warner bros was good, i think he was cast for his film because of his previous films, experience, and professionalism
indrid bergman was already a star before casablanca, some of her previous films were Dr. Jekyll and Mr. Hyde, Adam Had Four Sons, her relationship with warner bros was good, i think she was cast because she was a known star and was popular
dooley wilson was not a star before casablanca, some of his earlier films were Take a Letter, Darling , My favourite blonde, he had no relationship with warner bros, i think he was cast because of his ability to perform musically and as a character
paul henreid was already a star before casablanca, some of his earlier films were Under Your Hat, Joan of Paris, Night Train to Munich, his relationship with warner bros was good, i think he was chosen because of his skill in acting
Claude rains was already a star before casablanca, some of his earlier films were The Wolf ManFour Mothers and the sea hawk, his relationship with warner bros was good, i think he was chosen because je was a good actor
conrad veid was a german born actor who escaped germany someof his previous films were the man who laughs, and waxworks, he had a good realationship with warner bros, i think he was chosen as the idea of a german playing a nazi in a film to boost morale would be more realistic
sydney greenstreet was already a star through the film the maltease falcon, for which he received a nomination for a supporting actor award, some of his previous films were the maltease falcon and they died with their boots on, i think he was chosen because he acted in the maltease falcon, and so did other actors
peter lorre was already an actor and had been in quite a lot of films, some of his previous films were The missing wife, M, the white demon, and the man who knew too much, i think he was chosen because he was an already well known star who had been in a lot of films and was recognisable at the time.