While Robby the Robot may not be as instantly recognizable as modern movie robots like R2-D2 or WALL-E, those droids owe much of their inspiration to the bot from “Forbidden Planet.” The futuristic Robby is credited for being one of the first on-screen robots to have personality. The $100,000 price to build the robot’s unique futuristic look was a massive expenditure for a film prop made in 1956. But Robby became such a star from his role in “Forbidden Planet,” he made many other appearances in shows including “The Addams Family,” “Lost in Space,” and “The Twilight Zone.” He even had a brief cameo in 1984’s “Gremlins.”

Robby’s final starring role was taking center stage in a 2017 “Out of This World!” auction, where the robot became the most expensive movie prop ever sold, coming in at $5.375 million including auction house premium. The Robby suit is comprised of three interlocking parts and was sold alongside his original Jeep, an alternative ‘claw,’ and a second head that was used for “The Twilight Zone.” “I’m astounded by the price, but also sad to part with him,” said a statement released by Robby’s former owner, filmmaker William Malone. “It’s time Robby finds a place where he can be displayed, and with someone who can look after him. Of course, he will leave an empty spot in my house — and in my heart.”