Cast & creator
John Ratzenberger
Best known for The Simpsons, CSI: Crime Scene Investigation, Bones
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: John Dezso Ratzenberger
120
film credits
63
television credits
177
1954–2026 · acting roles
6.7
average across scored titles
Signature credits
Known for
Across film & television
Filmography (183)
Showing 183 of 183 credits
The Simpsons
Cliff Clavin / CGI Homer Simpson (voice)
1989
CSI: Crime Scene Investigation
Stu Kirchoff
2000
Bones
Bill Schumacher
2005
The View
Self
1997
Toy Story 5
Hamm (voice)
2026
Frasier
Cliff Clavin
1993
Dancing with the Stars
Self - Contestant
2005
Cheers
Cliff Clavin
1982Cheers
Director
1982
The Goldbergs
Digby Yates
2013
Magnum, P.I.
Walt Brewster
1980
Touched by an Angel
Merl
1994
Sabrina, the Teenage Witch
Bob
1996
That '70s Show
Glen
1998
The Drew Carey Show
Himself
1995
Mom
Stan
2013
Private Schulz
American Newsreel Commentator (voice, uncredited)
1981
Hill Street Blues
Phony Cop
1981
St. Elsewhere
Cliff Clavin
1982
Hell's Kitchen
Self - Bartender & Guest Judge
2005
Wings
Cliff Clavin
1990
Inside Out
Fritz (voice)
2015
Coco
Juan Ortodoncia (voice)
2017
Toy Story 2
Hamm (voice)
1999
Sister, Sister
Gus Kilamilikimaka
1994Sister, Sister
Director
1994
Swapped
Elder Javan (voice)
2026
ITV Playhouse
Tom Phillips
1967ITV Playhouse
Writer
1967
Inside Out 2
Fritz (voice)
2024
Caroline in the City
Mr. Berman
1995
Franklin & Bash
Judge Elliot Reid
2011
WALL·E
John (voice)
2008
Drop Dead Diva
Larry Kaswell
2009
Fish Hooks
Wilford (voice)
2010
Toy Story
Hamm (voice)
1995
Finding Nemo
Fish School (voice)
2003
Monsters, Inc.
Yeti (voice)
2001
8 Simple Rules
Fred
2002
The Incredibles
Underminer (voice)
2004
Toy Story 3
Hamm (voice)
2010
Cars 2
Mack (voice)
2011
Blossom
1990
Ratatouille
Mustafa (voice)
2007
Captain Planet and the Planeteers
Rigger (voice)
1990
Toy Story 4
Hamm (voice)
2019
Up
Construction Foreman Tom (voice)
2009
Monsters at Work
Yeti (voice)
2021Monsters at Work
Adorable (voice)
2021Monsters at Work
Adorable / Bernard (voice)
2021Monsters at Work
Bernard (voice)
2021Monsters at Work
Bernard / Arodable (voice)
2021
The Good Dinosaur
Earl (voice)
2015
Bob Hearts Abishola
Hank
2019
Poker Face
Abe
2023
Cars
Mack / Hamm Truck / Abominable Snow Plow / P.T. Flea Car (voice)
2006
Monsters University
Yeti (voice)
2013
Brave
Gordon (voice)
2012
The Wonderful World of Disney
1997
Cars 3
Mack (voice)
2017
A Bug's Life
P.T. Flea (voice)
1998
Incredibles 2
Underminer (voice)
2018
Happily Ever After: Fairy Tales for Every Child
Hinky (voice)
1995
LEGO Star Wars: The Freemaker Adventures
Major Derlin (voice)
2016
Luck
Rootie (voice)
2022
Secret Army
Staff Sergeant Dexter
1977
Evening Shade
Director
1990
The Empire Strikes Back
Major Derlin
1980
Finding Dory
Husband Crab (Bill) (voice)
2016
WondLa
Caruncle (voice)
2024
Onward
Construction Worker Fennwick (voice)
2020
Planes: Fire & Rescue
Brodi (voice)
2014
The Wonderful World of Disney
Cliff Clavin
1954
Superman
1st Controller
1978
Remember WENN
Mr. Abernathy
1996
Superman II
Controller
1980
Hawaiian Vacation
Hamm (voice)
2011
Rodney
John Ratzenberger
2004
A Bridge Too Far
U.S. Lieutenant
1977
Planes
Harland (voice)
2013
John Ratzenberger's Made in America
2004
Code Red
1981
Madman of the People
Director
1994
Gandhi
American Lieutenant
1982
Ray Gunn
(voice)
2026
Pearl
Director
1996
Just Roll with It
George Bennett
2019
Small Fry
Hamm (voice)
2011
Toy Story Treats
Hamm (Voice)
1996
Spellbound
Milo The Monster Handler (voice)
2024
Wizards and Warriors
1983
Firefox
Chief Peck
1982
Legit
Walter Nugent
2013Legit
Walter
2013
Partysaurus Rex
Hamm (voice)
2012
Something New
Brian's Father (uncredited)
2006
Pigs Next Door
Ike Stump (voice)
2000
The Tortellis
Cliff Clavin
1987
The Pixar Story
Yeti (voice) (archive footage)
2007
Outland
Tarlow
1981
Superman II: The Richard Donner Cut
Controller #1
2006
Goliath Awaits
Bill Sweeney
1981
Super Buddies
Marvin 'Gramps' Livingstone
2013
Forky Asks a Question
Hamm (voice)
2019
Your Friend the Rat
P.T. Flea (voice) (uncredited)
2007
That Darn Cat
Dusty
1997
House II: The Second Story
Bill
1987
Motel Hell
Drummer
1980
One Night Stand
Phil
1997
Mickey's 60th Birthday
Cliff Clavin
1988
Reds
Communist Leader (uncredited)
1981
Yanks
Cpl Cook
1979
The Falcon and the Snowman
Detective
1985
Warlords of Atlantis
Fenn
1978
She's Having a Baby
John Ratzenberger (uncredited)
1988
Ragtime
Policeman
1981
Twilight's Last Gleaming
Sgt. Kopecki
1977
Hanover Street
Sgt. John Lucas
1979
Pup Star: Better 2Gether
Salty (voice)
2017
Cars: Lightning Racers
Mack (voice)
Arabian Adventure
Achmed
1979Untitled Jack and the Beanstalk Film
(voice)
Disneyland's 35th Anniversary Celebration
Cliff Clavin
1990
The Earth Day Special
Cliff Clavin
1990
Valentino
Newshound
1977
Under Pressure
Al Calavito
1997
Forky Asks a Question: What Is Money?
Hamm (voice)
2019
What if...
Mike the Angel
2010
Forky Asks a Question: What Is a Friend?
Hamm (voice)
2019
Geared-Up
2006
Must See TV: An All Star Tribute to James Burrows
Self
2016
Buzz Lightyear Mission Logs
Hamm (voice)
2010
The Story Behind 'Toy Story'
Self
1996
Battletruck
Rusty
1982
Dog's Best Friend
Goat (voice)
1997
Shifting Gears
Conrad Baines
2018
NBC 75th Anniversary Special
Self
2002
WWJD II: The Woodcarver
Ernest Otto
2012
Pup Star: World Tour
Grandpa Growl (voice)
2018
Toy Story at 20: To Infinity and Beyond
Self
2015
The Santa Con
Warden
2014
Monkey Up
Mr. Hartz
2016
The Ritz
Patron
1976
Miracle in East Texas
Dad Everett
2020
Small World
Morris Zapp
1988
Camp Cucamonga
Marvin Schector
1990
Pup Star
Mutt (voice)
2016
Russell Madness
Mick Vaughn
2015
In Search of Tomorrow
Self - Interviewee
2022
Timestalkers
General Joe Brodsky
1987
Toy Story 6
Hamm (voice)
The Art of 'Spirited Away'
Self
2003
How Murray Saved Christmas
Officer Bender (voice)
2014
The Pennsylvania Miners' Story
Thomas 'Tucker' Foy
2002
A Fare to Remember
Mickey
1999
Matchmaker Santa
George
2012
Going to the Chapel
Walt Caruso
1988
Likely Stories, Vol. 4
Jersey Cop #2
1983
Tapawingo
Tom Roan
2025
In The Name of God
Reverend Thomas
2013
Monty Python: Live at Aspen
Audience Member (uncredited)
1998
Protocol
Security Guard on TV
1984
Tick Tock
Clay Fairfield, P.I.
2000
The Bitch
Hal Leonard
1979
Combat Academy
Mr. Barnett
1986
Local Commercial
Earl T. Barnum
2012
Project: Puppies for Christmas
Daniel Nilwater
2019
Disney's Magic in the Magic Kingdom
Self
1988
Determination of Death
Charlie Halloran
2001
Disney Through The Decades
2001
A Christmas Mystery
Logan Walker
2014
Right of Way
Policeman
1983
Change of Heart
Dr. Charles Burke
2016
Fixing Pete
Clayton
2012
Mystery Woman: Redemption
Jim Carter
2006
Grace of God
Reverend Thomas
2014
Our First Christmas
Joe Noll
2008
The Village Barbershop
Art Leroldi
2008
The Frasier Story
Self
1999
The Good Soldier
Jimmy
1981
Tiny Toy Stories
Hamm (voice)
1996