92 min. Twentieth Century-Fox Film Corp.; Distributed by: Twentieth Century-Fox Film Corp.; Directed by: Robert Wise; Produced by: Julian Blaustein; Screenplay by:Ernest Lehman; Edited by: William Reynolds; Director of Photography: Leo Tover; Music by: Bernard Herrmann; Production Design by: Lyle Wheeler & Addison Hehr; Sound by: Arthur L. Kirbach & Harry M. Leonard; Costumes by: Travilla; Make-up by: Ben Nye.

Michael Rennie (Klaatu), Patricia Neal (Helen Benson), Hugh Marlowe (Tom Stevens), Sam Jaffe (Professor Barnhardt), Billy Gray (Bobby Benson), Frances Bavier (Mrs. Barley), Lock Martin (Gort), Drew Pearson (Himself), Carleton Young (Colonel), Frank Conroy (Harley), Fay Roope (Major General), Edith Evanson (Mrs. Crockett), Robert Osterloh (Major White), Tyler McVey (Brady), James Seay (Government Man), John Brown (Mr. Barley), Marjorie Crossland (Hilda), Glenn Hardy (Interviewer), House Peters, Jr. (M.P. Captain), Rush Williams (M.P. Sergeant), Olan Soule (Mr. Kurll), Gil Herman (Government Agent), Gabriel Heater, H. V. Kaltenborn and Elmer Davis (Commentators).

The robot Gort was played by the only man in Hollywood who could fit the suit: Lock Martin, the 7'7" tall doorman at Grauman's Chinese Theater.

The Gort costume was 8'2" tall. There were actually two Gort suits, one that laced in the front and one that laced in the back. These suits were worn depending on the angle of the shoot.

Additionally, there was a fibreglass Gort that stood over 9' tall and was used in static shots where the height of the robot needed to be accentuated.