John Ratzenberger

John Dezso Ratzenberger (born April 6, 1947) is an American actor, voice actor, director, producer, writer, entrepreneur and comedian. He played Cliff Clavin on the TV show Cheers, for which he earned two Emmy nominations, and plays voice roles in every Pixar Animation Studios film, including Hamm in the Toy Story franchise, The Underminer in The Incredibles franchise, and Mack in the Cars franchise. He is the only voice actor to appear in every Pixar feature film, and with minor appearances in major films such as Superman and The Empire Strikes Back, he is one of the most successful actors of all time in terms of box-office receipts.