Jason Alexander
Acting
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 Musical. He appeared in the Los Angeles production of The Producers with Martin Short. He is the Artistic Director of "Reprise! Broadway's Best in Los Angeles," where he has directed several musicals. Alexander is also an avid poker player.
Born: September 23, 1959 · Newark, New Jersey, USA
Filmography (158)
TV
LEGO Marvel Avengers: Strange Tails
2025
Actor: Magneto (voice)
TV
The Bad Guys: The Series
2025
Actor: Mysterious Figure …
The Electric State
2025
Actor: Ted / Wingman
TV
Y llegaron de noche
2024
Actor: Carl Laemmle
Dick Van Dyke: 98 Years of Magic
2023
Actor: Self - Performer
Leo
2023
Actor: Jayda's Dad (voice…
TV
Rock, Paper, Scissors
2023
Actor: Jonathan Fartjoke …
TV
History of the World: Part II
2023
Actor: Maurice Cheeks
Out of Office
2022
Actor
Cinderella: The Reunion, A Special Edition of 20/20
2022
Actor
TV
Star Trek: Prodigy
2021
Actor: Doctor Noum (voice…Actor: Counselor Noum (vo…
TV
The Problem with Jon Stewart
2021
Actor: Jeff Bezos
TV
History of the Sitcom
2021
Actor: Self - Actor
TV
Celebrity Wheel of Fortune
2021
Actor: Self - Contestant
Faith Based
2020
Actor: Nicky Steele
TV
Stars in the House
2020
ActorActor: Self - Special Gue…
My Boyfriend's Meds
2020
Actor: Dr. Sternbach
TV
The Movies That Made Us
2019
Actor
TV
Harley Quinn
2019
Actor: Sy Borgman (voice)
TV
Mad About You
2019
Actor: Jason Alexander
TV
The Conners
2018
Actor: Pastor Phil
TV
Young Sheldon
2017
Actor: Gene Lundy
TV
The Orville
2017
Actor: Olix
The Truth Is in the Stars
2017
Actor
TV
The Marvelous Mrs. Maisel
2017
Actor: Asher Friedman
Best Worst Thing That Ever Could Have Happened...
2016
Actor
For the Love of Spock
2016
Actor
TV
The $100,000 Pyramid
2016
Actor
TV
Match Game
2016
Actor: Self - Panelist
Tom and Jerry: Back to Oz
2016
Actor: Mr. Bibb / The Nom…
TV
To Tell the Truth
2016
Actor: Self - Panelist
The Last Laugh
2016
Actor
TV
The Grinder
2015
Actor: Cliff Bemis
Larry Gaye: Renegade Male Flight Attendant
2015
Actor: Larry's Dad
TV
Big Time in Hollywood, Fl
2015
Actor: Jason Alexander
TV
The Late Late Show with James Corden
2015
Actor
Misery Loves Comedy
2015
Actor
Wild Card
2015
Actor: Pinky
How Murray Saved Christmas
2014
Actor: Doc Holiday (voice…
TV
Penn Zero: Part-Time Hero
2014
Actor: Coach Wallace (voi…
Lucky Stiff
2014
Actor: Vinnie Di Ruzzio
TV
The Tom and Jerry Show
2014
Actor: Rick (voice)
TV
TripTank
2014
Actor: Doctor (voice)
TV
Late Night with Seth Meyers
2014
Actor: Self - Guest
TV
Kirstie
2013
Actor: Stanford Temple
TV
Hollywood Game Night
2013
Actor
TV
Drunk History
2013
Actor: William Tweed
TV
Comedians in Cars Getting Coffee
2012
Actor
TV
Comedy Bang! Bang!
2012
Actor: Inspector Gantlet
National Lampoon's Another Dirty Movie
2012
Actor: Self (uncredited)
TV
Talking Dead
2011
Actor
TV
China, IL
2011
Actor: Harold (voice)
A Fairly Odd Movie: Grow Up, Timmy Turner!
2011
Actor: Cosmo
TV
Franklin & Bash
2011
Actor: Carter Lang
TV
Harry's Law
2011
Actor: Richard Cross
TV
Mike & Molly
2010
Director
Quantum Quest: A Cassini Space Odyssey
2010
Actor: Moronic (voice)
TV
Fish Hooks
2010
Actor: Mr. NibblesActor: Mr. Nibbles (voice…
Rock Slyde
2010
Actor: Mailman Stan
TV
The Cleveland Show
2009
Actor
TV
Community
2009
Actor: Mountain Man
TV
Meteor
2009
Actor: Dr. Chetwyn
Hachi: A Dog's Tale
2009
Actor: Carl
TV
Shatner's Raw Nerve
2008
Actor
The Grand
2007
Actor: Dr. Yakov Achmed
Farce of the Penguins
2006
Actor: Penguin on Belly (…
TV
Rachael Ray
2006
Actor: Self - Guest
TV
Talkshow with Spike Feresten
2006
Actor
Comedy Central Roast of William Shatner
2006
Actor: Self - Roastmaster
How to Go Out on a Date in Queens
2006
Actor: Johnny
Snoop Dogg's Hood of Horror
2006
Actor: British Record Mog…
Ira & Abby
2006
Actor: Dr. Morris Saperst…
TV
The New Adventures of Old Christine
2006
Actor: Dr. Palmer
TV
Campus Ladies
2006
Director
TV
Everybody Hates Chris
2005
Actor: Principal EdwardsDirector
TV
Criminal Minds
2005
Actor: Prof. RothchildDirector
The Aristocrats
2005
Actor
TV
Robot Chicken
2005
Actor: Krampus (voice)
TV
American Dad!
2005
Actor: Mr. Orlando (voice…Actor: Sal (voice)
TV
The Late Late Show with Craig Ferguson
2005
Actor
A Christmas Carol
2004
Actor: Jacob Marley / Mar…
Seinfeld: How It Began
2004
Actor: Self/George Costan…
TV
Listen Up!
2004
Actor: Tony Kleinman
Agent Cody Banks 2: Destination London
2004
Executive Producer
TV
Two and a Half Men
2003
Actor: Dr. Goodman
TV
The Ellen DeGeneres Show
2003
Actor
Agent Cody Banks
2003
Executive Producer
101 Dalmatians II: Patch's London Adventure
2003
Actor: Lightning (voice)
TV
Real Time with Bill Maher
2003
Actor
TV
Jimmy Kimmel Live!
2003
Actor
The Man Who Saved Christmas
2002
Actor: A.C. Gilbert
TV
The Twilight Zone
2002
Actor: Patient
TV
Monk
2002
Actor: Marty Eels
The Hunchback of Notre Dame II
2002
Actor: Gargoyle Hugo (voi…
Shallow Hal
2001
Actor: Mauricio Wilson
TV
The Legend of Tarzan
2001
Actor: Zutho (voice)
TV
Primetime Glick
2001
Actor
The Trumpet of the Swan
2001
Actor: Father (voice)
TV
Critics Choice Awards
2001
Actor
TV
Disney's House of Mouse
2001
Actor
TV
Curb Your Enthusiasm
2000
Actor: Jason Alexander
TV
The Huntress
2000
Actor
The Adventures of Rocky & Bullwinkle
2000
Actor: Boris
TV
Son of the Beach
2000
Actor
TV
Malcolm in the Middle
2000
Actor: Leonard
The N.Y. Friars Club Roast of Jerry Stiller
1999
Actor: Self - Roastmaster
Just Looking
1999
Director
Larry David: Curb Your Enthusiasm
1999
Actor
Love and Action in Chicago
1999
Actor: Frank Bonner
Madeline: Lost in Paris
1999
Actor: Uncle Horst / Henr…
TV
The Late Late Show with Craig Kilborn
1999
Actor: Self - Guest
TV
Dilbert
1999
Actor: Catbert (voice)
Jingle Bells
1999
Actor: Elf (Voice)
TV
Hollywood Squares
1998
Actor: Self - Panelist
TV
Hercules
1998
Actor: PoseidonActor: Poseidon (voice)
Denial
1998
Actor: Art Witz
Cinderella
1997
Actor: Lionel
Love! Valour! Compassion!
1997
Actor: Buzz Hauser
The Hunchback of Notre Dame
1996
Actor: Gargoyle Hugo (voi…
TV
Muppets Tonight
1996
Actor
TV
Remember WENN
1996
Actor: Alan BallingerDirector
Dunston Checks In
1996
Actor: Robert Grant
Bye Bye Birdie
1995
Actor: Albert J. Peterson
The Last Supper
1995
Actor: Anti-Enviroment
For Better or Worse
1995
Actor: Michael MakeshiftDirector
TV
Star Trek: Voyager
1995
Actor: Kurros
The Return of Jafar
1994
Actor: Abis Mal - the Chi…
TV
Friends
1994
Actor: Earl
Blankman
1994
Actor: Mr. Stone
North
1994
Actor: North's Dad
The Paper
1994
Actor: Marion Sandusky
TV
Duckman
1994
Actor: Duckman (voice)
TV
Aladdin
1994
Actor: Abis Mal (voice)Actor: Captain Albatross …+1
TV
The Nanny
1993
Actor: Jack
Coneheads
1993
Actor: Larry Farber
TV
The Larry Sanders Show
1992
Actor: Jason Alexander
I Don't Buy Kisses Anymore
1992
Actor: Bernie Fishbine
TV
Dinosaurs
1991
Actor: Grown Baby (voice)Actor: Stu (voice)+5
Jacob's Ladder
1990
Actor: Geary
White Palace
1990
Actor: Neil
TV
Dream On
1990
Actor: Randall Townsend
Pretty Woman
1990
Actor: Philip Stuckey
TV
The Simpsons
1989
Actor: Bourbon Verlander …
TV
Seinfeld
1989
Actor: George CostanzaDirector
TV
LIVE with Kelly and Mark
1988
Actor: Self - Guest
Brighton Beach Memoirs
1986
Actor: Pool Player #1
The Mosquito Coast
1986
Actor: Hardware Clerk
TV
E/R
1984
Actor: Harold StickleyActor
TV
Jeopardy!
1984
Actor
TV
Reading Rainbow
1983
Actor: Self - Narrator (v…
TV
Newhart
1982
Actor
TV
Late Night with David Letterman
1982
Actor
Senior Trip
1981
Actor: Pete
The Burning
1981
Actor: Dave
TV
Saturday Night Live
1975
Actor: Self - HostActor: Self - Cameo (uncr…
TV
People's Choice Awards
1975
Actor: Self - Host
TV
The Emmy Awards
1949
Actor
TV
Golden Globe Awards
1944
Actor: Self - Nominee