
Actor · Director · 25 credits
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.

Rock, Paper, Scissors
2024
Jonathan Fartjoke (voice)

Harley Quinn
2019
Sy Borgman (voice)

Young Sheldon
2017
Gene Lundy

The Orville
2017
Olix

The Tom and Jerry Show
2014
Rick (voice)

Franklin & Bash
2011
Carter Lang

Fish Hooks
2010
Mr. Nibbles

Community
2009
Mountain Man

Everybody Hates Chris
2005
Principal Edwards

American Dad!
2005
Mr. Orlando (voice)

Two and a Half Men
2003
Dr. Goodman

Monk
2002
Marty Eels

Curb Your Enthusiasm
2000
Jason Alexander

Malcolm in the Middle
2000
Leonard

Hercules
1998
Poseidon

Star Trek: Voyager
1995
Kurros
10Friends
1994
Earl

Duckman
1994
Duckman (voice)

The Nanny
1993
Jack

The Larry Sanders Show
1992
Jason Alexander

Dinosaurs
1991
Grown Baby (voice)

The Simpsons
1989
Bourbon Verlander (voice)
8Seinfeld
1989
George Costanza