Metro Goldwyn Mayer ; United Artists ; a film produced by Alberto Grimaldi for PEA, Produzioni Europee Associate, Roma ; story and screenplay by Federico Fellini and Bernardino Zapponi ; directed by Federico Fellini ; additional screenplay, Brunello Rondi
United Artists presents a film produced by Alberto Grimaldi ; screenplay by Age [Agenore Incrocci], Scarpelli [Furio Scarpelli], Luciano Vincenzoni and Sergio Leone ; English version by Mickey Knox ; directed by Sergio Leone