Robby the Robot is a fictional character and science fiction icon who first appeared in the 1956 film Forbidden Planet. He made a number of subsequent appearances in science fiction movies and television programs, usually without specific reference to the original film character.
The name "Robbie the Robot" (spelled with an "ie") had appeared in science fiction before Forbidden Planet. In a pulp magazine adventure The Fantastic Island (1935), the name is used for a mechanical likeness of Doc Savage used to confuse foes. The name is also used in Isaac Asimov's short story "Robbie" (1940) about a first-generation robot designed to care for children. In "Tom Swift on The Phantom Satellite" (1956), it is also the name given to a small four-foot robot designed by Tom Swift Jr., the boy inventor in the Tom Swift Jr. science fiction novel series by Victor Appleton II.
Robby the Robot originated as a character in the 1956 film Forbidden Planet. He is a 7-foot (2.1 m) tall robot whose "mouth" is a monochromatic blue light organ, synchronized to his synthetic voice, its band of curved tubes located directly below his transparent conical "face" dome. He walks on mechanical legs.
The illusion of a real robot was created by a suit operated from inside by an uncredited stuntman Frankie Darro; his voice was provided in post-production by actor Marvin Miller. Robby was created by MGM’s prop department; the initial design was sketched by Arnold "Buddy" Gillespie, refined by production illustrator Mentor Huebner, and then turned into reality under the direction of mechanical designer Robert Kinoshita.