who does the voice of mack in cars 3
John Ratzenberger John Dezso Ratzenberger (born April 6, 1947)[1] is an American actor, voice actor, and entrepreneur. He is known for playing Cliff Clavin in the TV show Cheers, for which he earned two Emmy nominations. He is also known for his extensive voice roles in Pixar Animation Studios' films, such as Hamm in the Toy Story franchise and Mack in the Cars franchise. He is the only actor to appear in all of Pixar's feature films, and with minor appearances in major films such as Superman and The Empire Strikes Back, is one of the most successful actors of all time in terms of box-office receipts.[2]