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John Ratzenberger

John Ratzenberger

John Dezso Ratzenberger is an American actor, voice actor, and entrepreneur. He played Cliff Clavin in the TV show Cheers, for which he earned two Emmy nominations, and plays voice roles in Pixar Animation Studios' films, including Hamm in the Toy Story franchise, The Underminer in The Incredibles franchise, and Mack in the Cars franchise.