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
Metro-Goldwyn-Mayer ; the Mirisch Company presents ; a Mirisch-Alpha production ; screenplay by William Roberts ; produced and directed by John Sturges