One of the most famous robots in pop-culture history has been sold at auction. The costume for Robby the Robot, made iconic through the film Forbidden Planet, has been sold through the New York auction house Bonhams for $5,375,000.

One of the most memorable designs of the 1950s, Robby was created under the supervision of Arnold "Buddy" Gillespie and built by draughtsman and mechanical designer Robert Kinoshita. Kinoshita had previously worked designing washing machines and reflected that in his construction of Robby's torso.

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Loosely influenced by elements in Frtiz Lang's 1927 Metropolis, Robby was built with metal, vacuum-forming heated plastic, rubber, glass and Plexiglas. One of the earliest examples of plastic heated over a wooden form, the project was one of the most expensive props in Hollywood history at the time, coming in at $125,000—over a million in today's money.

Standing over 7 feet tall with three detachable parts, the level of detail in the original Robby costume is remarkable. From the robot's conical head with elements resembling gyroscopes and saxophones to the internal jointing in its legs that allowed for smoother motion for the actor inside, Robby offered a strong rebuttal to the minimalism of other sci-fi robots of the era like Gort of The Day The Earth Stood Still.

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In the film, Robby is seen as a genderless wisecracking servant to the mysterious Dr. Morbius. However, Robby's wit and genial demeanor is not what made it famous. The Forbidden Planet poster, depicting Robby carrying a powerless woman, shows a dark pulp-y image that is starkly different from the robot's actual personality in the film.

Here's hoping that whoever bought this costume appreciates Robby's lighter side.

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