The Public Enemy is a 1931 American pre-Code gangster film produced and distributed by Warner Bros. The film was directed by William A. Wellman, and starring James Cagney, Jean Harlow, Edward Woods, Donald Cook and Joan Blondell. The film relates the story of a young man's rise in the criminal underworld in Prohibition-era urban America. The supporting players include Beryl Mercer, Murray Kinnell, and Mae Clarke. The screenplay is based on an unpublished novel—Beer and Blood by two former newspapermen, John Bright and Kubec Glasmon—who had witnessed some of Al Capone's murderous gang rivalries in Chicago.