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 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.
Personal Details
Also Known As
Movies (26)
Jimmy
as Louis B. Mayer
2026
The Gettysburg Address
as Noah Brooks (voice)
2025
Paddy Chayefsky: Collector of Words
as Self
2025
Stealing Pulp Fiction
as Dr. Mendelbaum
2025
The Electric State
as Ted / Wingman
2025
Dick Van Dyke: 98 Years of Magic
as Self - Performer
2023
Leo
as Jayda's Dad (voice)
2023
The Conspiracy
2022
Killing Me Softly with His Songs
as Self
2022
Out of Office
2022
Cinderella: The Reunion, A Special Edition of 20/20
as Self
2022
Dunston Checks Out
as Jason Alexander (archival footage)
2022
Broadway: Beyond the Golden Age
as Self
2021
The Rocky Horror Musical Live Stream
as Narrator
2020
Faith Based
as Nicky Steele
2020
My Boyfriend's Meds
as Dr. Sternbach
2020
The Portuguese Kid
as Barry Dragonetti
2018
Bucky and the Squirrels
as Jason Alexander
2018
Broadway: The Next Generation
as Self
2017
The Truth Is in the Stars
as Self
2017
The Mark Lembeck Technique
as Mark Lembeck
2016
Best Worst Thing That Ever Could Have Happened...
as Self
2016
For the Love of Spock
as Self
2016
There's Something About Romcoms
as Self
2016
Tom and Jerry: Back to Oz
as Mr. Bibb / The Nome King (voice)
2016
The Last Laugh
as Self
2016
TV Shows (24)
LEGO Marvel Avengers: Strange Tails
as Magneto (voice)
2025
The Bad Guys: Breaking In
as Mysterious Figure (voice)
2025
Y llegaron de noche
as Carl Laemmle
2024
Rock, Paper, Scissors
as Jonathan Fartjoke (voice)
2023
History of the World: Part II
as Maurice Cheeks
2023
Star Trek: Prodigy
as Doctor Noum (voice)
2021
The Problem with Jon Stewart
as Jeff Bezos
2021
History of the Sitcom
as Self - Actor
2021
Celebrity Wheel of Fortune
as Self - Contestant
2021
Stars in the House
as Self
2020
The Movies That Made Us
as Self
2019
Harley Quinn
as Sy Borgman (voice)
2019
Mad About You
as Jason Alexander
2019
The Conners
as Pastor Phil
2018
Hit the Road
as Ken Swallow
2017
Young Sheldon
as Gene Lundy
2017
The Orville
as Olix
2017
Kody Kapow
as Goji (voice)
2017
The Marvelous Mrs. Maisel
as Asher Friedman
2017
Dinner with Dad
as Jason Alexander
2017
The $100,000 Pyramid
as Self
2016
Match Game
as Self - Panelist
2016
To Tell the Truth
as Self - Panelist
2016
The Grinder
as Cliff Bemis
2015