Jason Alexander
Acting
226
Acting Credits
9
Directed
Biography
Jay Scott Greenspan (born September 23, 1959), better known by his professional name of Jason Alexander, is an American actor, writer, comedian, television director and producer, and singer. He is best known for his role as George Costanza on the television series Seinfeld, appearing in the sitcom from 1989 to 1998. He also has had an active career on the stage, appearing in several Broadway musicals including Jerome Robbins' Broadway in 1989, for which he won the Tony Award as Best Actor in a M...
Known For
Filmography
Jimmy
2026
as Louis B. Mayer
To Kill a Nazi
2026
as Narrator
Mating Season
2026
as Alan (voice)
The Electric State
2025
as Ted / Wingman
Stealing Pulp Fiction
2025
as Dr. Mendelbaum
The Gettysburg Address
2025
as Noah Brooks (voice)
Paddy Chayefsky: Collector of Words
2025
as Self
The Bad Guys: The Series
2025
as Mysterious Figure (voice)
The Bad Guys: The Series
2025
as D.B. Cougar (voice)
LEGO Marvel Avengers: Strange Tails
2025
as Magneto (voice)
Rock, Paper, Scissors
2024
as Jonathan Fartjoke (voice)
Y llegaron de noche
2024
as Carl Laemmle
Leo
2023
as Jayda's Dad (voice)
Dick Van Dyke: 98 Years of Magic
2023
as Self - Performer
History of the World: Part II
2023
as Maurice Cheeks
Cinderella: The Reunion, A Special Edition of 20/20
2022
as Self
Out of Office
2022
Killing Me Softly with His Songs
2022
as Self
The Conspiracy
2022
Dunston Checks Out
2022
as Jason Alexander (archival footage)
Broadway: Beyond the Golden Age
2021
as Self
History of the Sitcom
2021
as Self - Actor
Star Trek: Prodigy
2021
as Doctor Noum (voice)
Star Trek: Prodigy
2021
as Counselor Noum (voice)
Celebrity Wheel of Fortune
2021
as Self - Contestant
The Problem with Jon Stewart
2021
as Jeff Bezos
My Boyfriend's Meds
2020
as Dr. Sternbach
Faith Based
2020
as Nicky Steele
The Rocky Horror Musical Live Stream
2020
as Narrator
Stars in the House
2020
as Self
Stars in the House
2020
as Self - Special Guest
Who Wants to Be a Millionaire
2020
as Self - Contestant
The Movies That Made Us
2019
as Self
Harley Quinn
2019
as Sy Borgman (voice)
Mad About You
2019
as Jason Alexander
Bucky and the Squirrels
2018
as Jason Alexander
The Portuguese Kid
2018
as Barry Dragonetti
The Conners
2018
as Pastor Phil
The Truth Is in the Stars
2017
as Self
Hit the Road
2017
as Ken Swallow
Dinner with Dad
2017
as Jason Alexander
The Marvelous Mrs. Maisel
2017
as Asher Friedman
Kody Kapow
2017
as Goji (voice)
The Orville
2017
as Olix
Young Sheldon
2017
as Gene Lundy
There's Something About Romcoms
2016
as Self
The Last Laugh
2016
as Self (archive footage) (uncredited)
For the Love of Spock
2016
as Self
Best Worst Thing That Ever Could Have Happened...
2016
as Self
Tom and Jerry: Back to Oz
2016
as Mr. Bibb / The Nome King (voice)
The Mark Lembeck Technique
2016
as Mark Lembeck
Match Game
2016
as Self - Panelist
The $100,000 Pyramid
2016
as Self
To Tell the Truth
2016
as Self - Panelist
Wild Card
2015
as Pinky
Misery Loves Comedy
2015
as Self
Larry Gaye: Renegade Male Flight Attendant
2015
as Larry's Dad
China, Il The Musical
2015
as Harold
The Grinder
2015
as Cliff Bemis
The Late Late Show with James Corden
2015
as Self
Big Time in Hollywood, Fl
2015
as Jason Alexander
The Late Show with Stephen Colbert
2015
as Self - Guest
Lucky Stiff
2014
as Vinnie Di Ruzzio
How Murray Saved Christmas
2014
as Doc Holiday (voice)
Late Night with Seth Meyers
2014
as Self - Guest
The Tom and Jerry Show
2014
as Rick (voice)
Penn Zero: Part-Time Hero
2014
as Coach Wallace (voice)
TripTank
2014
as Doctor (voice)
Drunk History
2013
as William Tweed
Kirstie
2013
as Stanford Temple
Hollywood Game Night
2013
as Self
Stars in Shorts
2012
as Sid Rosenthal
National Lampoon's Another Dirty Movie
2012
as Self (uncredited)
Say It Ain't Solo
2012
as Self
Comedy Bang! Bang!
2012
as Inspector Gantlet
Comedians in Cars Getting Coffee
2012
as Self
A Fairly Odd Movie: Grow Up, Timmy Turner!
2011
as Cosmo
The Voyages of Young Doctor Dolittle
2011
as Eugene (voice)
Dora the Explorer: Dora's Enchanted Forest Adventures
2011
as Owl (voice)
Talking Dead
2011
as Self
China, IL
2011
as Harold (voice)
Harry's Law
2011
as Richard Cross
Franklin & Bash
2011
as Carter Lang
Quantum Quest: A Cassini Space Odyssey
2010
as Moronic (voice)
Rock Slyde
2010
as Mailman Stan
Not Your Time
2010
as Sid Rosenthal
The Marriage Ref
2010
as Self - Panelist
Fish Hooks
2010
as Mr. Nibbles
Fish Hooks
2010
as Mr. Nibbles (voice)
Hachi: A Dog's Tale
2009
as Carl
The Cleveland Show
2009
Meteor
2009
as Dr. Chetwyn
Community
2009
as Mountain Man
Step It Up and Dance
2008
Shatner's Raw Nerve
2008
as Self
Jerry Seinfeld: Submarine Captain
2007
as Self
The Grand
2007
as Dr. Yakov Achmed
Thank God You're Here
2007
as Self
Farce of the Penguins
2006
as Penguin on Belly (voice)
Snoop Dogg's Hood of Horror
2006
as British Record Mogul
How to Go Out on a Date in Queens
2006
as Johnny
Comedy Central Roast of William Shatner
2006
as Self - Roastmaster
Ira & Abby
2006
as Dr. Morris Saperstein
Talkshow with Spike Feresten
2006
The New Adventures of Old Christine
2006
as Dr. Palmer
Where My Dogs At?
2006
Rachael Ray
2006
as Self - Guest
The Aristocrats
2005
as Self
Earth to America
2005
as self
Everybody Hates Chris
2005
as Principal Edwards
The Late Late Show with Craig Ferguson
2005
as Self
American Dad!
2005
as Mr. Orlando (voice)
Criminal Minds
2005
as Prof. Rothchild
Robot Chicken
2005
as Krampus (voice)
American Dad!
2005
as Sal (voice)
A Christmas Carol
2004
as Jacob Marley / Marley's Ghost
Seinfeld: How It Began
2004
as Self/George Costanza
The Seinfeld Story
2004
as Self
Kramer vs. Kramer: Kenny to Cosmo
2004
as Self
The Tony Danza Show
2004
as Self - Guest
Listen Up!
2004
as Tony Kleinman
101 Dalmatians II: Patch's London Adventure
2003
as Lightning (voice)
The Very Best of America's Funniest Comedians
2003
as Self (archive footage)
The Ellen DeGeneres Show
2003
as Self
Jimmy Kimmel Live!
2003
as Self
Two and a Half Men
2003
as Dr. Goodman
Real Time with Bill Maher
2003
as Self
The Hunchback of Notre Dame II
2002
as Gargoyle Hugo (voice)
The Man Who Saved Christmas
2002
as A.C. Gilbert
Monk
2002
as Marty Eels
The Twilight Zone
2002
as Patient
Shallow Hal
2001
as Mauricio Wilson
The Trumpet of the Swan
2001
as Father (voice)
Being 'Shallow Hal'
2001
as Self
Bravo Profiles: Penn and Teller
2001
as Self
On Edge
2001
as Zamboni Phil
The Legend of Tarzan
2001
as Zutho (voice)
Disney's House of Mouse
2001
Bob Patterson
2001
as Bob Patterson
Good Day Live
2001
as Self
Critics Choice Awards
2001
as Self
Primetime Glick
2001
The Adventures of Rocky & Bullwinkle
2000
as Boris
Let's Rap Fire Safety
2000
Son of the Beach
2000
The Huntress
2000
Curb Your Enthusiasm
2000
as Jason Alexander
Malcolm in the Middle
2000
as Leonard
Madeline: Lost in Paris
1999
as Uncle Horst / Henri (voice)
Jingle Bells
1999
as Elf (Voice)
Sideshow: Alive on the Inside
1999
as Narrator
Ultimate Trek: Star Trek's Greatest Moments
1999
as Host
Larry David: Curb Your Enthusiasm
1999
as Self
The N.Y. Friars Club Roast of Jerry Stiller
1999
as Self - Roastmaster
Love and Action in Chicago
1999
as Frank Bonner
The Late Late Show with Craig Kilborn
1999
as Self - Guest
Dilbert
1999
as Catbert (voice)
Denial
1998
as Art Witz
Titey
1998
as Titey (voice)
Hercules
1998
as Poseidon
Hollywood Squares
1998
as Self - Panelist
Hercules
1998
as Poseidon (voice)
Cinderella
1997
as Lionel
Love! Valour! Compassion!
1997
as Buzz Hauser
The Hunchback of Notre Dame
1996
as Gargoyle Hugo (voice)
Dunston Checks In
1996
as Robert Grant
The Making of Disney's The Hunchback of Notre Dame
1996
Muppets Tonight
1996
as Self
Remember WENN
1996
as Alan Ballinger
The Last Supper
1995
as Anti-Enviroment
Bye Bye Birdie
1995
as Albert J. Peterson
For Better or Worse
1995
as Michael Makeshift
A Tribute to Stephen Sondheim
1995
Star Trek: Voyager
1995
as Kurros
Blankman
1994
as Mr. Stone
North
1994
as North's Dad
The Paper
1994
as Marion Sandusky
Down on the Waterfront
1994
The Return of Jafar
1994
as Abis Mal (voice)
Duckman
1994
as Duckman (voice)
Friends
1994
as Earl
Aladdin
1994
as Abis Mal (voice)
Aladdin
1994
as Captain Albatross (voice)
Aladdin
1994
as Abis Mal / Abnor Mal (voice)
Coneheads
1993
as Larry Farber
For Goodness Sake
1993
as Electronics Store Customer
Sexual Healing
1993
as Frank
The Nanny
1993
as Jack
I Don't Buy Kisses Anymore
1992
as Bernie Fishbine
The Larry Sanders Show
1992
as Jason Alexander
Dinosaurs
1991
as Grown Baby (voice)
Dinosaurs
1991
as Stu (voice)
Dinosaurs
1991
as Gus Molehill (voice)
Dinosaurs
1991
as The Job Wizard (voice)
Dinosaurs
1991
as General H. Norman Conquest (voice)
Dinosaurs
1991
as Sexual Harris (voice)
Dinosaurs
1991
as UFO! Host / Announcer (voice)
Pretty Woman
1990
as Philip Stuckey
Jacob's Ladder
1990
as Geary
White Palace
1990
as Neil
Dream On
1990
as Randall Townsend
Seinfeld
1989
as George Costanza
The Simpsons
1989
as Bourbon Verlander (voice)
Favorite Son
1988
as Chris Van Allen
LIVE with Kelly and Mark
1988
as Self - Guest
Everything's Relative
1987
as Julian Beeby
Brighton Beach Memoirs
1986
as Pool Player #1
The Mosquito Coast
1986
as Hardware Clerk
Rockabye
1986
as Lt. Ernest Foy
E/R
1984
as Harold Stickley
E/R
1984
Jeopardy!
1984
as Self
Jeopardy!
1984
as Self - Clue Presenter
Reading Rainbow
1983
as Self - Narrator (voice)
Newhart
1982
Late Night with David Letterman
1982
as Self
The Burning
1981
as Dave
Senior Trip
1981
as Pete
A Capitol Fourth
1980
as Self
Saturday Night Live
1975
as Self - Host
People's Choice Awards
1975
as Self - Host
Saturday Night Live
1975
as Titey (voice)
Saturday Night Live
1975
as Self (uncredited)
Tony Awards
1956
as Self - Presenter
The Emmy Awards
1949
as Self
Golden Globe Awards
1944
as Self - Nominee