
John Ratzenberger
Biography
John Dezso Ratzenberger is an American actor, voice actor, director, producer, writer and entrepreneur. He is one of the most successful actors of all time in terms of box-office receipts. Ratzenberger is best known for portraying Cliff Clavin on the popular comedy series Cheers, for which he earned two Primetime Emmy nominations. He is also known being a voice actor appearing in almost every Pixar Animation Studios feature film, including Hamm in the Toy Story franchise, The Underminer in The Incredibles franchise, and Mack in the Cars franchise. 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, a role he portrayed throughout the show's eleven seasons. His first Pixar role was the voice of Hamm in Toy Story, and he has voiced Pixar characters in films and video games ever since. 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.
Also Known As
Movie Appearances

Toy Story
as Hamm (voice)
1995

Toy Story 2
as Hamm (voice)
1999

Cars
as Mack / Hamm Truck / Abominable Snow Plow / P.T. Flea Car (voice)
2006

Monsters, Inc.
as Yeti (voice)
2001

Ratatouille
as Mustafa (voice)
2007

Toy Story 3
as Hamm (voice)
2010

Outland
as Tarlow
1981

The Empire Strikes Back
as Major Derlin
1980

Warlords of Atlantis
as Fenn
1978

Motel Hell
as Drummer
1980

Ragtime
as Policeman
1981

A Bug's Life
as P.T. Flea (voice)
1998

Up
as Construction Foreman Tom (voice)
2009

House II: The Second Story
as Bill
1987

Monsters University
as Yeti (voice)
2013

Valentino
as Newshound
1977

Cars 2
as Mack (voice)
2011

Miracle in East Texas
as Dad Everett
2020

Camp Cucamonga
as Marvin Schector
1990

The Good Soldier
as Jimmy
1981
TV Appearances

St. Elsewhere
as Cliff Clavin
1982

That '70s Show
as Glen
1998

Magnum, P.I.
as Walt Brewster
1980

Cheers
as Cliff Clavin
1982

The Simpsons
as Cliff Clavin / CGI Homer Simpson (voice)
1989

Touched by an Angel
as Merl
1994

Wings
as Cliff Clavin
1990

Sister, Sister
as Gus Kilamilikimaka
1994

Frasier
as Cliff Clavin
1993

8 Simple Rules
as Fred
2002

Blossom
1990

Rodney
as John Ratzenberger
2004