John Dezso Ratzenberger is an American actor, widely known for his role as Cliff Clavin on the comedy series Cheers (1982–1993), for which he earned two Primetime Emmy nominations. Ratzenberger reprised the role in the short-lived spin-off The Tortellis, an episode of Wings, as well as in an episode of Frasier. He has voiced various characters in Pixar animated feature films including Hamm in the Toy Story franchise, Yeti the Abominable Snowman in the Monsters, Inc. franchise, The Underminer in The Incredibles franchise, Mack in the Cars franchise, Fritz in the Inside Out franchise, and many others.