
Jason Alexander
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
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Filmography
Acting (207)
Movies (103)
Jimmy
2026 Upcomingas Louis B. Mayer
Nov 20
The Electric State
2025as Ted / Wingman
The Gettysburg Address
2025as Noah Brooks (voice)
Stealing Pulp Fiction
2025as Dr. Mendelbaum
Paddy Chayefsky: Collector of Words
2025as Self
Leo
2023as Jayda's Dad (voice)
Dick Van Dyke: 98 Years of Magic
2023as Self - Performer
Killing Me Softly with His Songs
2022as Self
Out of Office
2022
Cinderella: The Reunion, A Special Edition of 20/20
2022as Self
Dunston Checks Out
2022as Jason Alexander (archival footage)
The Conspiracy
2022
Broadway: Beyond the Golden Age
2021as Self
My Boyfriend's Meds
2020as Dr. Sternbach
Faith Based
2020as Nicky Steele
The Rocky Horror Musical Live Stream
2020as Narrator
Bucky and the Squirrels
2018as Jason Alexander
The Portuguese Kid
2018as Barry Dragonetti
The Truth Is in the Stars
2017as Self
Broadway: The Next Generation
2017as Self
The Mark Lembeck Technique
2016as Mark Lembeck
There's Something About Romcoms
2016as Self
Tom and Jerry: Back to Oz
2016as Mr. Bibb / The Nome King (voice)
For the Love of Spock
2016as Self
Best Worst Thing That Ever Could Have Happened...
2016as Self
The Last Laugh
2016as Self
Wild Card
2015as Pinky
Larry Gaye: Renegade Male Flight Attendant
2015as Larry's Dad
Misery Loves Comedy
2015as Self
China, Il The Musical
2015as Harold
Lucky Stiff
2014as Vinnie Di Ruzzio
How Murray Saved Christmas
2014as Doc Holiday (voice)
Stars in Shorts
2012as Sid Rosenthal
National Lampoon's Another Dirty Movie
2012as Self (uncredited)
Say It Ain't Solo
2012as Self
A Fairly Odd Movie: Grow Up, Timmy Turner!
2011as Cosmo
Dora the Explorer: Dora's Enchanted Forest Adventures
2011as Owl (voice)
The Voyages of Young Doctor Dolittle
2011as Eugene (voice)
Rock Slyde
2010as Mailman Stan
Quantum Quest: A Cassini Space Odyssey
2010as Moronic (voice)
Not Your Time
2010as Sid Rosenthal
Hachi: A Dog's Tale
2009as Carl
The Grand
2007as Dr. Yakov Achmed
Jerry Seinfeld: Submarine Captain
2007as Self
Farce of the Penguins
2006as Penguin on Belly (voz)
Comedy Central Roast of William Shatner
2006as Self - Roastmaster
Snoop Dogg's Hood of Horror
2006as British Record Mogul
Ira & Abby
2006as Dr. Morris Saperstein
How to Go Out on a Date in Queens
2006as Johnny
The Aristocrats
2005as Self
Earth to America
2005as self
Kramer vs. Kramer: Kenny to Cosmo
2004as Self
Seinfeld: How It Began
2004as Self/George Costanza
A Christmas Carol
2004as Jacob Marley / Marley's Ghost
The Seinfeld Story
2004as Self
101 Dalmatians II: Patch's London Adventure
2003as Lightning (voice)
The Very Best of America's Funniest Comedians
2003as Self (archive footage)
The Hunchback of Notre Dame II
2002as Gargoyle Hugo (voice)
The Man Who Saved Christmas
2002as A.C. Gilbert
Shallow Hal
2001as Mauricio Wilson
The Trumpet of the Swan
2001as Father (voice)
Bravo Profiles: Penn and Teller
2001as Self
On Edge
2001as Zamboni Phil
Being 'Shallow Hal'
2001as Self
The Adventures of Rocky & Bullwinkle
2000as Boris
Let's Rap Fire Safety
2000
Madeline: Lost in Paris
1999as Uncle Horst / Henri (voice)
Jingle Bells
1999as Elf (Voice)
Larry David: Curb Your Enthusiasm
1999as Self
Sideshow: Alive on the Inside
1999as Narrator
The N.Y. Friars Club Roast of Jerry Stiller
1999as Self - Roastmaster
Love and Action in Chicago
1999as Frank Bonner
Ultimate Trek: Star Trek's Greatest Moments
1999as Host
Denial
1998as Art Witz
Titey
1998as Titey (voice)
Cinderella
1997as Lionel
Love! Valour! Compassion!
1997as Buzz Hauser
The Hunchback of Notre Dame
1996as Gargoyle Hugo (voice)
Dunston Checks In
1996as Robert Grant
Sex, Censorship and the Silver Screen
1996as Quote Reader
The Last Supper
1995as Anti-Enviroment
Bye Bye Birdie
1995as Albert J. Peterson
For Better or Worse
1995as Michael Makeshift
A Tribute to Stephen Sondheim
1995
Blankman
1994as Mr. Stone
The Paper
1994as Marion Sandusky
Down on the Waterfront
1994
North
1994as North's Dad
The Return of Jafar
1994as Abis Mal - the Chief of the Thieves (voice)
Coneheads
1993as Larry Farber
Sexual Healing
1993as Frank
For Goodness Sake
1993as Electronics Store Customer
I Don't Buy Kisses Anymore
1992as Bernie Fishbine
Pretty Woman
1990as Philip Stuckey
Jacob's Ladder
1990as Geary
White Palace
1990as Neil
Brighton Beach Memoirs
1986as Pool Player #1
The Mosquito Coast
1986as Hardware Clerk
Rockabye
1986as Lt. Ernest Foy
The Burning
1981as Dave
Senior Trip
1981as Pete
Leo 2
The Sisters Rosensweig
as Mervyn
Television (104)
The Bad Guys: The Series
2025as Mysterious Figure (voice)
LEGO Marvel Avengers: Strange Tails
2025as Magneto (voice)
Y llegaron de noche
2024as Carl Laemmle
History of the World: Part II
2023as Maurice Cheeks
Rock, Paper, Scissors
2023as Jonathan Fartjoke (voice)
Star Trek: Prodigy
2021as Doctor Noum (voice)
The Problem with Jon Stewart
2021as Jeff Bezos
Celebrity Wheel of Fortune
2021as Self - Contestant
History of the Sitcom
2021as Self - Actor
Stars in the House
2020as Self
Harley Quinn
2019as Sy Borgman (voice)
The Movies That Made Us
2019as Self
Mad About You
2019as Jason Alexander
The Conners
2018as Pastor Phil
Young Sheldon
2017as Gene Lundy
The Orville
2017as Olix
The Marvelous Mrs. Maisel
2017as Asher Friedman
Kody Kapow
2017as Goji (voice)
Hit the Road
2017as Ken Swallow
Dinner with Dad
2017as Jason Alexander
The $100,000 Pyramid
2016as Self
To Tell the Truth
2016as Self - Panelist
Match Game
2016as Self - Panelist
The Late Late Show with James Corden
2015as Self
The Grinder
2015as Cliff Bemis
Big Time in Hollywood, Fl
2015as Jason Alexander
Late Night with Seth Meyers
2014as Self - Guest
The Tom and Jerry Show
2014as Rick (voice)
Penn Zero: Part-Time Hero
2014as Coach Wallace (voice)
TripTank
2014as Doctor (voice)
Drunk History
2013as William Tweed
Hollywood Game Night
2013as Self
Kirstie
2013as Stanford Temple
Comedy Bang! Bang!
2012as Inspector Gantlet
Comedians in Cars Getting Coffee
2012as Self
Franklin & Bash
2011as Carter Lang
Talking Dead
2011as Self
Harry's Law
2011as Richard Cross
China, IL
2011as Harold (voice)
Fish Hooks
2010as Mr. Nibbles (voice)
The Marriage Ref
2010as Self - Panelist
Community
2009as Mountain Man
The Cleveland Show
2009
Meteor
2009as Dr. Chetwyn
Shatner's Raw Nerve
2008as Self
Step It Up and Dance
2008
Thank God You're Here
2007as Self
The New Adventures of Old Christine
2006as Dr. Palmer
Talkshow with Spike Feresten
2006
Rachael Ray
2006as Self - Guest
Where My Dogs At?
2006
American Dad!
2005as Sal (voice)
Criminal Minds
2005as Prof. Rothchild
The Late Late Show with Craig Ferguson
2005as Self
Robot Chicken
2005as Krampus (voice)
Everybody Hates Chris
2005as Principal Edwards
The Tony Danza Show
2004as Self - Guest
Listen Up!
2004as Tony Kleinman
Real Time with Bill Maher
2003as Self
Two and a Half Men
2003as Dr. Goodman
Jimmy Kimmel Live!
2003as Self
The Ellen DeGeneres Show
2003as Self
Monk
2002as Marty Eels
The Twilight Zone
2002as Patient
Good Day Live
2001as Self
The Legend of Tarzan
2001as Zutho (voice)
Critics Choice Awards
2001as Self
Primetime Glick
2001
Bob Patterson
2001as Bob Patterson
Curb Your Enthusiasm
2000as Jason Alexander
Malcolm in the Middle
2000as Leonard
Son of the Beach
2000
The Huntress
2000
Dilbert
1999as Catbert (voice)
The Late Late Show with Craig Kilborn
1999as Self - Guest
Hollywood Squares
1998as Self - Panelist
Hercules
1998as Poseidon (voice)
Remember WENN
1996as Alan Ballinger
Muppets Tonight
1996as Self
Star Trek: Voyager
1995as Kurros
Friends
1994as Earl
Duckman
1994as Duckman (voice)
Aladdin
1994as Abis Mal (voice)
The Nanny
1993as Jack
The Larry Sanders Show
1992as Jason Alexander
Dinosaurs
1991as The Job Wizard (voice)
Dream On
1990as Randall Townsend
The Simpsons
1989as Bourbon Verlander (voice)
Seinfeld
1989as George Costanza
LIVE with Kelly and Mark
1988as Self - Guest
Favorite Son
1988as Chris Van Allen
Everything's Relative
1987as Julian Beeby
Jeopardy!
1984as Self
E/R
1984
Reading Rainbow
1983as Self - Narrator (voice)
Late Night with David Letterman
1982as Self
Newhart
1982
A Capitol Fourth
1980as Self
Saturday Night Live
1975as Self - Host
People's Choice Awards
1975as Self - Host
Tony Awards
1956as Self - Presenter
The Emmy Awards
1949as Self
Golden Globe Awards
1944as Self - Nominee
Saturday TV Funhouse
as Titey (voice)
Crew (16)
Movies (5)
Television (11)
Dinner with Dad
2017Writer
Mike & Molly
2010Director
Campus Ladies
2006Director
Criminal Minds
2005Director
Everybody Hates Chris
2005Director
Bob Patterson
2001Creator
Bob Patterson
2001Executive Producer
Bob Patterson
2001Story
Bob Patterson
2001Teleplay
Remember WENN
1996Director
Seinfeld
1989Director
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