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.
Filmography
Cast Credits
Jimmy
Character: Louis B. Mayer
MOVIE • 2026
The Gettysburg Address
Character: Noah Brooks (voice)
MOVIE • 2025
Paddy Chayefsky: Collector of Words
Character: Self
MOVIE • 2025
Stealing Pulp Fiction
Character: Dr. Mendelbaum
MOVIE • 2025
The Electric State
Character: Ted / Wingman
MOVIE • 2025
Y llegaron de noche
Character: Carl Laemmle
TV • 2024
Rock, Paper, Scissors
Character: Jonathan Fartjoke (voice)
TV • 2024
Dick Van Dyke: 98 Years of Magic
Character: Self - Performer
MOVIE • 2023
Leo
Character: Jayda's Dad (voice)
MOVIE • 2023
History of the World: Part II
Character: Maurice Cheeks
TV • 2023
The Conspiracy
Character:
MOVIE • 2022
Killing Me Softly with His Songs
Character: Self
MOVIE • 2022
Out of Office
Character:
MOVIE • 2022
Cinderella: The Reunion, A Special Edition of 20/20
Character: Self
MOVIE • 2022
Dunston Checks Out
Character: Jason Alexander (archival footage)
MOVIE • 2022
Star Trek: Prodigy
Character: Doctor Noum (voice)
TV • 2021
Star Trek: Prodigy
Character: Counselor Noum (voice)
TV • 2021
The Problem with Jon Stewart
Character: Jeff Bezos
TV • 2021
Broadway: Beyond the Golden Age
Character: Self
MOVIE • 2021
History of the Sitcom
Character: Self - Actor
TV • 2021
Crew
Crew Credits
Dinner with Dad
Role: Writer
TV • 2017
The Mark Lembeck Technique
Role: Consulting Producer
MOVIE • 2016
Mike & Molly
Role: Director
TV • 2010
Campus Ladies
Role: Director
TV • 2006
Everybody Hates Chris
Role: Director
TV • 2005
Criminal Minds
Role: Director
TV • 2005
Agent Cody Banks
Role: Executive Producer
MOVIE • 2003
Bob Patterson
Role: Creator
TV • 2001
Bob Patterson
Role: Story
TV • 2001
Bob Patterson
Role: Teleplay
TV • 2001
Bob Patterson
Role: Executive Producer
TV • 2001
Bob Patterson
Role: Creator
TV • 2001
Just Looking
Role: Director
MOVIE • 1999
Remember WENN
Role: Director
TV • 1996
For Better or Worse
Role: Director
MOVIE • 1995
Seinfeld
Role: Director
TV • 1989