John Ratzenberger, American actor and director
John Dezso Ratzenberger (born April 6, 1947) is an American actor, voice actor and filmmaker. He is one of the most successful actors of all time in terms of box-office receipts. Ratzenberger portrayed Cliff Clavin on the comedy series Cheers, for which he earned two Primetime Emmy nominations. He had voiced a character in each of the first 22 Pixar Animation Studios feature films, including Hamm in the Toy Story franchise, The Abominable Snowman in the Monsters, Inc. franchise, Mack in the Cars franchise and The Underminer in The Incredibles franchise, until 2020.

Born in Bridgeport, Connecticut, Ratzenberger began his entertainment career while living in London in the 1970s. He had minor film and television roles throughout the late 70s and early 1980s before creating, and then landing, the role of the know-it-all mailman Cliff Clavin on Cheers (1982–1993), a role he portrayed throughout the show's eleven seasons. His first Pixar role was the voice of Hamm in Toy Story (1995), and he voiced Pixar characters in every film and video game until 2020.

From 2004 to 2008, he hosted the TV documentary series Made in America. Outside of acting, he has promoted American entrepreneurship and manufacturing, and campaigned for several Republican candidates.