 A Hollywood legend claims that Warner Brothers, makers of  _Casablanca (1942)_ (qv), threatened to sue the Marx Brothers for  using the word "Casablanca" in the title. Groucho Marx (qv) wrote  a letter to Warner Brothers in which he threatened to sue them for  using the word "Brothers": "Professionally, we were brothers before  they ever were." However, film critic Richard Roeper (qv) claims  that the story is fake, that Warner Brothers never threatened to  sue, and Groucho wrote the letter as a publicity stunt for the  movie.