Jason Alexander
Jay Scott Greenspan, 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.
Acted in
The Gettysburg Address
2025
as Noah Brooks (voice)
The Electric State
2025
To the Journey - Looking Back at Star Trek: Voyager
2024
as Self
Stealing Pulp Fiction
2024
as Dr. Mendelbaum
Y llegaron de noche
2024
Rock, Paper, Scissors
2024
as Jonathan Fartjoke (voice)
Dick Van Dyke: 98 Years of Magic
2023
as Self - Performer
Leo
2023
as Jayda's Dad (voice)
History of the World: Part II
2023
as Maurice Cheeks
The Conspiracy
2022
Killing Me Softly with His Songs
2022
as Self
Out of Office
2022
Cinderella: The Reunion, A Special Edition of 20/20
2022
as Self
Star Trek: Prodigy
2021
as Doctor Noum (voice)
Star Trek: Prodigy
2021
as Counselor Noum (voice)
Broadway: Beyond the Golden Age
2021
as Self
History of the Sitcom
2021
as Self - Actor
Celebrity Wheel of Fortune
2021
as Self - Contestant
The Rocky Horror Musical Live Stream
2020
as Narrator
Faith Based
2020
as Nicky Steele
Stars in the House
2020
as Self
Stars in the House
2020
as Self - Special Guest
My Boyfriend's Meds
2020
as Dr. Sternbach
The Movies That Made Us
2019
as Self
Harley Quinn
2019
as Sy Borgman (voice)
Mad About You
2019
as Jason Alexander
The Conners
2018
as Pastor Phil
The Portuguese Kid
2018
as Barry Dragonetti
Bucky and the Squirrels
2018
as Jason Alexander
Broadway: The Next Generation
2017
as Self
Hit the Road
2017
as Ken Swallow
Young Sheldon
2017
as Gene Lundy
The Orville
2017
as Olix
Kody Kapow
2017
as Goji (voice)
The Truth Is in the Stars
2017
as Self
The Marvelous Mrs. Maisel
2017
as Asher Friedman
Dinner with Dad
2017
as Jason Alexander
The Mark Lembeck Technique
2016
as Mark Lembeck
Best Worst Thing That Ever Could Have Happened...
2016
as Self
For the Love of Spock
2016
as Self
There's Something About Romcoms
2016
as Self
Match Game
2016
as Self - Panelist
Tom and Jerry: Back to Oz
2016
as Mr. Bibb / The Nome King (voice)
To Tell the Truth
2016
as Self - Panelist
The Last Laugh
2016
as Self
They're Real & They're Spectacular: Seinfeld Super Fans & The Summer of George
2016
as George Costanza (archive footage)
The Grinder
2015
as Cliff Bemis
Larry Gaye: Renegade Male Flight Attendant
2015
as Larry's Dad
Big Time in Hollywood, Fl
2015
as Jason Alexander
Misery Loves Comedy
2015
as Self
Wild Card
2015
as Pinky
How Murray Saved Christmas
2014
as Doc Holiday (voice)
Penn Zero: Part-Time Hero
2014
as Coach Wallace (voice)
Lucky Stiff
2014
as Vinnie Di Ruzzio
The Tom and Jerry Show
2014
as Rick (voice)
TripTank
2014
as Doctor (voice)
Kirstie
2013
as Stanford Temple
Hollywood Game Night
2013
as Self
Stars In Shorts
2012
as Sid Rosenthal
Another Dirty Movie
2012
as Self (uncredited)
Say It Ain't Solo
2012
as Himself
The Voyages of Young Doctor Dolittle
2011
as Eugene (voice)
China, IL
2011
as Harold (voice)
Dora the Explorer: Dora's Enchanted Forest Adventures
2011
as Owl (voice)
A Fairly Odd Movie: Grow Up, Timmy Turner!
2011
as Cosmo
Not Your Time
2010
as Sid Rosenthal
Quantum Quest: A Cassini Space Odyssey
2010
as Moronic (voice)
Fish Hooks
2010
as Mr. Nibbles
Fish Hooks
2010
as Mr. Nibbles (voice)
Rock Slyde
2010
as Mailman Stan
The Marriage Ref
2010
as Self - Panelist
The Cleveland Show
2009
Community
2009
as Mountain Man
Meteor
2009
as Dr. Chetwyn
Hachi: A Dog's Tale
2009
as Carl
Step It Up and Dance
2008
Jerry Seinfeld: Submarine Captain
2007
as Himself
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)
Comedy Central Roast of William Shatner
2006
as Self - Roastmaster
How to Go Out on a Date in Queens
2006
as Johnny
Snoop Dogg's Hood of Horror
2006
as British Record Mogul
Ira & Abby
2006
as Dr. Morris Saperstein
Where My Dogs At?
2006
The New Adventures of Old Christine
2006
as Dr. Palmer
Earth to America
2005
as self
Everybody Hates Chris
2005
Criminal Minds
2005
as Prof. Rothchild
The Aristocrats
2005
as Self
Robot Chicken
2005
as Krampus (voice)
American Dad!
2005
as Mr. Orlando (voice)
American Dad!
2005
as Sal (voice)
A Christmas Carol
2004
as Jacob Marley / Marley's Ghost
Seinfeld: How It Began
2004
as Himself/George Costanza
Listen Up!
2004
as Tony Kleinman
Two and a Half Men
2003
as Dr. Goodman
The Very Best of America's Funniest Comedians
2003
as Self (archive footage)
101 Dalmatians II: Patch's London Adventure
2003
as Lightning (voice)
The Man Who Saved Christmas
2002
as A.C. Gilbert
The Twilight Zone
2002
as Patient
Monk
2002
as Marty Eels
The Hunchback of Notre Dame II
2002
as Gargoyle Hugo (voice)
Being 'Shallow Hal'
2001
as Self
Shallow Hal
2001
as Mauricio
Bob Patterson
2001
as Bob Patterson
The Legend of Tarzan
2001
as Zutho (voice)
The Trumpet of the Swan
2001
as Father (voice)
Critics Choice Awards
2001
as Self
Disney's House of Mouse
2001
Curb Your Enthusiasm
2000
as Jason Alexander
The Huntress
2000
The Adventures of Rocky & Bullwinkle
2000
as Boris
Son of the Beach
2000
Let's Rap Fire Safety
2000
Malcolm in the Middle
2000
as Leonard
Ultimate Trek: Star Trek's Greatest Moments
1999
as Host
The N.Y. Friars Club Roast of Jerry Stiller
1999
as Self - Roastmaster
Larry David: Curb Your Enthusiasm
1999
as Self
Love and Action in Chicago
1999
as Frank Bonner
Madeline: Lost in Paris
1999
as Uncle Horst / Henri (voice)
Sideshow: Alive on the Inside
1999
as Narrator
Dilbert
1999
as Catbert (voice)
Jingle Bells
1999
as Elf (Voice)
Hollywood Squares
1998
as Self - Panelist
Hollywood Squares
1998
Hercules
1998
as Poseidon
Hercules
1998
as Poseidon (voice)
Denial
1998
as Art Witz
Titey
1998
as Titey (voice)
Cinderella
1997
as Lionel
Love! Valour! Compassion!
1997
as Buzz Hauser
The Hunchback of Notre Dame
1996
as Gargoyle Hugo (voice)
Muppets Tonight
1996
as Self
Dunston Checks In
1996
as Robert Grant
Sex, Censorship and the Silver Screen
1996
as Quote Reader
Bye Bye Birdie
1995
as Albert J. Peterson
The Last Supper
1995
as Anti-Enviroment
For Better or Worse
1995
as Michael Makeshift
Star Trek: Voyager
1995
as Kurros
Friends
1994
as Earl
Blankman
1994
as Mr. Stone
North
1994
as North's Dad
The Return of Jafar
1994
as Abis Mal - the Chief of the Thieves (voice)
Down on the Waterfront
1994
The Paper
1994
as Marion Sandusky
Duckman
1994
as Duckman (voice)
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
Sexual Healing
1993
as Frank
For Goodness Sake
1993
as Electronics Store Customer
The Larry Sanders Show
1992
as Jason Alexander
I Don't Buy Kisses Anymore
1992
as Bernie Fishbine
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)
Jacob's Ladder
1990
as Geary
White Palace
1990
as Neil
Dream On
1990
as Randall Townsend
Pretty Woman
1990
as Philip Stuckey
The Simpsons
1989
as Bourbon Verlander (voice)
Seinfeld
1989
as George Costanza
Favorite Son
1988
as Chris Van Allen
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
Reading Rainbow
1983
as Himself - Narrator (voice)
Newhart
1982
Senior Trip
1981
as Pete
The Burning
1981
as Dave
A Capitol Fourth
1980
as Self
Tony Awards
1956
as Self - Presenter
The Emmy Awards
1949
as Self
Meteor
as Dr. Chetwyn
Richard Lovely
as Mr. Mouse
The Sisters Rosensweig
as Mervyn
Saturday TV Funhouse
as Titey (voice)