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Jason Alexander
AKA: Jason Scott Greenspan · جیسون الکساندر · Jay Scott Greenspan
Acting
Born: 1959
Newark, New Jersey, USA
88 Global Credits
🔥 2.1 Popularity
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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.
Known For
Mating Season
Alan (voice)
2026 · US
LEGO Marvel Avengers: Strange Tails
Magneto (voice)
2025 · CA
The Bad Guys: The Series
D.B. Cougar (voice)
2025 · US
Y llegaron de noche
Carl Laemmle
2024 · MX
History of the World: Part II
Maurice Cheeks
2023 · US
Star Trek: Prodigy
Counselor Noum (voice)
2021 · US
The Problem with Jon Stewart
Jeff Bezos
2021 · US
History of the Sitcom
Self - Actor
2021 · US
Full Credits
| Show / Title | Year | Credit / Role |
|---|---|---|
| Mating Season | 2026 | Alan (voice) |
| LEGO Marvel Avengers: Strange Tails | 2025 | Magneto (voice) |
| The Bad Guys: The Series | 2025 | D.B. Cougar (voice) |
| Y llegaron de noche | 2024 | Carl Laemmle |
| History of the World: Part II | 2023 | Maurice Cheeks |
| Star Trek: Prodigy | 2021 | Counselor Noum (voice) |
| The Problem with Jon Stewart | 2021 | Jeff Bezos |
| History of the Sitcom | 2021 | Self - Actor |
| Celebrity Wheel of Fortune | 2021 | Self - Contestant |
| Stars in the House | 2020 | Self |
| Harley Quinn | 2019 | Sy Borgman (voice) |
| Mad About You | 2019 | Jason Alexander |
| The Conners | 2018 | Pastor Phil |
| Young Sheldon | 2017 | Gene Lundy |
| Young Sheldon | 2017 | Director |
| The Orville | 2017 | Olix |
| The Marvelous Mrs. Maisel | 2017 | Asher Friedman |
| The $100,000 Pyramid | 2016 | Self |
| Match Game | 2016 | Self - Panelist |
| To Tell the Truth | 2016 | Self - Panelist |
| The Grinder | 2015 | Cliff Bemis |
| The Late Show with Stephen Colbert | 2015 | Self - Guest |
| Big Time in Hollywood, Fl | 2015 | Jason Alexander |
| The Late Late Show with James Corden | 2015 | Self |
| Penn Zero: Part-Time Hero | 2014 | Coach Wallace (voice) |
| The Tom and Jerry Show | 2014 | Rick (voice) |
| TripTank | 2014 | Doctor (voice) |
| Late Night with Seth Meyers | 2014 | Self - Guest |
| Hollywood Game Night | 2013 | Self |
| Comedians in Cars Getting Coffee | 2012 | Self |
| Comedy Bang! Bang! | 2012 | Inspector Gantlet |
| Talking Dead | 2011 | Self |
| Harry's Law | 2011 | Richard Cross |
| Mike & Molly | 2010 | Director |
| Fish Hooks | 2010 | Mr. Nibbles (voice) |
| The Marriage Ref | 2010 | Self - Panelist |
| The Cleveland Show | 2009 | Contributor |
| Community | 2009 | Mountain Man |
| Meteor | 2009 | Dr. Chetwyn |
| Shatner's Raw Nerve | 2008 | Self |
| Rachael Ray | 2006 | Self - Guest |
| Talkshow with Spike Feresten | 2006 | Contributor |
| Where My Dogs At? | 2006 | Contributor |
| The New Adventures of Old Christine | 2006 | Dr. Palmer |
| Everybody Hates Chris | 2005 | Principal Edwards |
| Everybody Hates Chris | 2005 | Director |
| Robot Chicken | 2005 | Krampus (voice) |
| American Dad! | 2005 | Mr. Orlando (voice) |
| The Late Late Show with Craig Ferguson | 2005 | Self |
| The Tony Danza Show | 2004 | Self - Guest |
| Two and a Half Men | 2003 | Dr. Goodman |
| The Ellen DeGeneres Show | 2003 | Self |
| Real Time with Bill Maher | 2003 | Self |
| Jimmy Kimmel Live! | 2003 | Self |
| The Twilight Zone | 2002 | Patient |
| Monk | 2002 | Marty Eels |
| Bob Patterson | 2001 | Bob Patterson |
| Bob Patterson | 2001 | Executive Producer, Teleplay |
| The Legend of Tarzan | 2001 | Zutho (voice) |
| Primetime Glick | 2001 | Contributor |
| Critics Choice Awards | 2001 | Self |
| Curb Your Enthusiasm | 2000 | Jason Alexander |
| The Huntress | 2000 | Contributor |
| Son of the Beach | 2000 | Contributor |
| Malcolm in the Middle | 2000 | Leonard |
| The Late Late Show with Craig Kilborn | 1999 | Self - Guest |
| Dilbert | 1999 | Catbert (voice) |
| Hercules | 1998 | Poseidon (voice) |
| Muppets Tonight | 1996 | Self |
| Star Trek: Voyager | 1995 | Kurros |
| Duckman | 1994 | Duckman (voice) |
| Aladdin | 1994 | Abis Mal (voice) |
| The Nanny | 1993 | Jack |
| The Larry Sanders Show | 1992 | Jason Alexander |
| Dinosaurs | 1991 | UFO! Host / Announcer (voice) |
| Dream On | 1990 | Randall Townsend |
| The Simpsons | 1989 | Bourbon Verlander (voice) |
| Seinfeld | 1989 | George Costanza |
| Seinfeld | 1989 | Director |
| LIVE with Kelly and Mark | 1988 | Self - Guest |
| Reading Rainbow | 1983 | Self - Narrator (voice) |
| Newhart | 1982 | Contributor |
| Late Night with David Letterman | 1982 | Self |
| Saturday Night Live | 1975 | Self - Host |
| People's Choice Awards | 1975 | Self - Host |
| Tony Awards | 1956 | Self - Presenter |
| Golden Globe Awards | 1944 | Self - Nominee |