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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.
The roles that explain the career.
64 credits across 4 departments.
| Year | Title | Role | Type |
|---|---|---|---|
| 2025 | The Electric State | Ted / Wingman | Film |
| 2022 | Cinderella: The Reunion, A Special Edition of 20/20 | Self | Film |
| 2021 | Broadway: Beyond the Golden Age | Self | Film |
| 2017 | Kody Kapow | Goji (voice) | TV |
| 2016 | Tom and Jerry: Back to Oz | Mr. Bibb / The Nome King (voice) | Film |
| 2015 | Wild Card | Pinky | Film |
| 2014 | How Murray Saved Christmas | Doc Holiday (voice) | Film |
| 2014 | The Borderlands | Christening Guest | Film |
| 2012 | Stars in Shorts | Sid Rosenthal | Film |
| 2011 | A Fairly Odd Movie: Grow Up, Timmy Turner! | Cosmo | Film |
| 2011 | The Voyages of Young Doctor Dolittle | Eugene (voice) | Film |
| 2010 | Rock Slyde | Mailman Stan | Film |
| 2010 | Quantum Quest: A Cassini Space Odyssey | Moronic (voice) | Film |
| 2009 | Hachi: A Dog's Tale | Carl | Film |
| 2007 | Jerry Seinfeld: Submarine Captain | Self | Film |
| 2007 | The Grand | Dr. Yakov Achmed | Film |
| 2006 | How to Go Out on a Date in Queens | Johnny | Film |
| 2006 | Ira & Abby | Dr. Morris Saperstein | Film |
| 2006 | Farce of the Penguins | Penguin on Belly (voice) | Film |
| 2006 | Snoop Dogg's Hood of Horror | British Record Mogul | Film |
| 2005 | The Aristocrats | Self | Film |
| 2004 | Listen Up! | Tony Kleinman | TV |
| 2004 | A Christmas Carol | Jacob Marley / Marley's Ghost | Film |
| 2004 | Kramer vs. Kramer: Kenny to Cosmo | Self | Film |
| 2004 | Agent Cody Banks 2: Destination London | Executive Producer | Film |
| 2003 | 101 Dalmatians II: Patch's London Adventure | Lightning (voice) | Film |
| 2003 | Agent Cody Banks | Executive Producer | Film |
| 2002 | The Man Who Saved Christmas | A.C. Gilbert | Film |
| 2002 | The Hunchback of Notre Dame II | Gargoyle Hugo (voice) | Film |
| 2001 | On Edge | Zamboni Phil | Film |
| 2001 | Shallow Hal | Mauricio Wilson | Film |
| 2001 | The Trumpet of the Swan | Father (voice) | Film |
| 2001 | Bob Patterson | Bob Patterson | TV |
| 2001 | Bob Patterson | Executive Producer | TV |
| 2000 | The Adventures of Rocky & Bullwinkle | Boris | Film |
| 1999 | Madeline: Lost in Paris | Uncle Horst / Henri (voice) | Film |
| 1999 | Jingle Bells | Elf (Voice) | Film |
| 1999 | Just Looking | Director | Film |
| 1998 | Denial | Art Witz | Film |
| 1997 | Love! Valour! Compassion! | Buzz Hauser | Film |
| 1997 | Cinderella | Lionel | Film |
| 1996 | Dunston Checks In | Robert Grant | Film |
| 1996 | The Hunchback of Notre Dame | Gargoyle Hugo (voice) | Film |
| 1995 | For Better or Worse | Michael Makeshift | Film |
| 1995 | The Last Supper | Anti-Enviroment | Film |
| 1995 | Bye Bye Birdie | Albert J. Peterson | Film |
| 1995 | For Better or Worse | Director | Film |
| 1994 | Blankman | Mr. Stone | Film |
| 1994 | North | North's Dad | Film |
| 1994 | The Paper | Marion Sandusky | Film |
| 1994 | Duckman | Duckman (voice) | TV |
| 1994 | The Return of Jafar | Abis Mal - the Chief of the Thieves (voice) | Film |
| 1993 | Coneheads | Larry Farber | Film |
| 1992 | I Don't Buy Kisses Anymore | Bernie Fishbine | Film |
| 1990 | White Palace | Neil | Film |
| 1990 | Jacob's Ladder | Geary | Film |
| 1990 | Pretty Woman | Philip Stuckey | Film |
| 1989 | Seinfeld | George Costanza | TV |
| 1986 | Brighton Beach Memoirs | Pool Player #1 | Film |
| 1986 | The Mosquito Coast | Hardware Clerk | Film |
| 1981 | Senior Trip | Pete | Film |
| 1981 | The Burning | Dave | Film |
| 1980 | A Capitol Fourth | Self | TV |
| Leo 2 | Film |
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