
Jason Alexander
Acting
Born 1959-09-23 · Newark, New Jersey, USA
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.
Known for

Seinfeld
1989 · TV

Duckman
1994 · TV

The Tom and Jerry Show
2014 · TV

Hollywood Squares
1998 · TV

A Capitol Fourth
1980 · TV

Listen Up!
2004 · TV

Harley Quinn
2019 · TV

Kody Kapow
2017 · TV

Real Time with Bill Maher
2003 · TV

Aladdin
1994 · TV

Young Sheldon
2017 · TV

China, IL
2011 · TV

Hit the Road
2017 · TV

Everything's Relative
1987 · TV

The Simpsons
1989 · TV

Dilbert
1999 · TV

Curb Your Enthusiasm
2000 · TV

Criminal Minds
2005 · TV

Star Trek: Prodigy
2021 · TV

History of the Sitcom
2021 · TV

Y llegaron de noche
2024 · TV

Match Game
2016 · TV

E/R
1984 · TV

Dinner with Dad
2017 · TV

American Dad!
2005 · TV

Friends
1994 · TV

Bob Patterson
2001 · TV

The Grinder
2015 · TV

The Marvelous Mrs. Maisel
2017 · TV

Two and a Half Men
2003 · TV

Malcolm in the Middle
2000 · TV

The Orville
2017 · TV

Monk
2002 · TV

Everybody Hates Chris
2005 · TV

Jimmy Kimmel Live!
2003 · TV

Favorite Son
1988 · TV

The Ellen DeGeneres Show
2003 · TV

The Conners
2018 · TV

The Nanny
1993 · TV

Star Trek: Voyager
1995 · TV

Hollywood Game Night
2013 · TV

Muppets Tonight
1996 · TV

To Tell the Truth
2016 · TV

LEGO Marvel Avengers: Strange Tails
2025 · TV

Meteor
2009 · TV

Robot Chicken
2005 · TV

Community
2009 · TV

Dinosaurs
1991 · TV

People's Choice Awards
1975 · TV

Newhart
1982 · TV

Franklin & Bash
2011 · TV

Rock, Paper, Scissors
2023 · TV

The Twilight Zone
2002 · TV

The Larry Sanders Show
1992 · TV

The Legend of Tarzan
2001 · TV

Reading Rainbow
1983 · TV

Saturday TV Funhouse
— · TV

Harry's Law
2011 · TV

The Cleveland Show
2009 · TV

The New Adventures of Old Christine
2006 · TV