From Wikipedia, the free encyclopedia. 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.
| Series | Saturday TV Funhouse | Titey (voice) | 2027 |
| Movie | The Sisters Rosensweig | Mervyn | 2027 |
| Movie | Jimmy | Louis B. Mayer | 2026-11-20 |
| Movie | The Electric State | Ted / Wingman | 2025-03-07 |
| Movie | The Gettysburg Address | Noah Brooks (voice) | 2025-11-19 |
| Movie | The Siege at Thorn High | Ody Nugroho | 2025-04-17 |
| Series | Y llegaron de noche | Carl Laemmle | 2024-10-04 |
| Movie | To the Journey: Looking Back at Star Trek: Voyager | Self | 2024-11-07 |
| Movie | Leo | Jayda's Dad (voice) | 2023-11-17 |
| Movie | Dick Van Dyke: 98 Years of Magic | Self - Performer | 2023-12-21 |
| Movie | Out of Office | 2022-09-05 | |
| Movie | Cinderella: The Reunion, A Special Edition of 20/20 | Self | 2022-08-23 |
| Movie | Broadway: Beyond the Golden Age | Self | 2021-08-14 |
| Movie | Faith Based | Nicky Steele | 2020-10-09 |
| Movie | The Rocky Horror Musical Live Stream | Narrator | 2020-10-31 |
| Movie | Bucky and the Squirrels | Jason Alexander | 2018-01-26 |
| Movie | The Truth Is in the Stars | Self | 2017-05-01 |
| Movie | Broadway: The Next Generation | Self | 2017-11-16 |
| Series | Hit the Road | Ken Swallow | 2017-10-17 |
| Series | Kody Kapow | Goji (voice) | 2017-07-15 |
| Movie | The Last Laugh | Self | 2016-04-18 |
| Movie | Tom and Jerry: Back to Oz | Mr. Bibb / The Nome King (voice) | 2016-06-21 |
| Movie | The Mark Lembeck Technique | Mark Lembeck | 2016-12-02 |
| Movie | Best Worst Thing That Ever Could Have Happened... | Self | 2016-11-18 |
| Movie | For the Love of Spock | Self | 2016-09-09 |
| Movie | Wild Card | Pinky | 2015-01-14 |
| Movie | Misery Loves Comedy | Self | 2015-01-23 |
| Series | The Late Late Show with James Corden | Himself | 2015-03-23 |
| Series | Big Time in Hollywood, Fl | Jason Alexander | 2015-03-25 |
| Movie | Larry Gaye: Renegade Male Flight Attendant | Larry's Dad | 2015-06-05 |
| Series | The Grinder | Cliff Bemis | 2015-09-29 |
| Movie | The Borderlands | Christening Guest | 2014-03-28 |
| Movie | Lucky Stiff | Vinnie Di Ruzzio | 2014-10-08 |
| Movie | Tom's Restaurant - A Documentary About Everything | 2014-12-22 | |
| Movie | How Murray Saved Christmas | Doc Holiday (voice) | 2014-12-05 |
| Series | Drunk History | William Tweed | 2013-07-09 |
| Movie | Say It Ain't Solo | Self | 2012-04-01 |
| Movie | Delhi Safari | Male Flamingo / Hyena Cook (voice) | 2012-10-19 |
| Movie | Stars in Shorts | Sid Rosenthal | 2012-09-28 |
| Movie | National Lampoon's Another Dirty Movie | Self (uncredited) | 2012-04-25 |
| Movie | A Fairly Odd Movie: Grow Up, Timmy Turner! | Cosmo | 2011-07-09 |
| Movie | Dora the Explorer: Dora's Enchanted Forest Adventures | Owl (voice) | 2011-09-13 |
| Movie | The Voyages of Young Doctor Dolittle | Eugene (voice) | 2011-11-01 |
| Series | Talking Dead | Himself | 2011-10-16 |
| Series | China, IL | Harold (voice) | 2011-10-02 |
| Movie | Rock Slyde | Mailman Stan | 2010-05-01 |
| Movie | Not Your Time | Sid Rosenthal | 2010-09-24 |
| Series | Fish Hooks | Mr. Nibbles | 2010-09-03 |
| Movie | Quantum Quest: A Cassini Space Odyssey | Moronic (voice) | 2010-09-17 |
| Movie | Hachi: A Dog's Tale | Carl | 2009-06-08 |
| Series | The Cleveland Show | Unknown | 2009-09-27 |
| Series | Community | Mountain Man | 2009-09-17 |
| Series | Meteor | Dr. Chetwyn | 2009-07-12 |
| Series | Step It Up and Dance | Unknown | 2008-04-03 |
| Movie | The Grand | Dr. Yakov Achmed | 2007-06-07 |
| Movie | Jerry Seinfeld: Submarine Captain | Self | 2007-07-02 |
| Series | Where My Dogs At? | Unknown | 2006-06-10 |
| Series | The New Adventures of Old Christine | Unknown | 2006-03-13 |
| Movie | Ira & Abby | Dr. Morris Saperstein | 2006-06-23 |
| Series | Talkshow with Spike Feresten | Unknown | 2006-09-16 |
| Movie | Farce of the Penguins | Penguin on Belly (voz) | 2006-12-01 |
| Movie | Snoop Dogg's Hood of Horror | British Record Mogul | 2006-06-27 |
| Movie | Comedy Central Roast of William Shatner | Self - Roastmaster | 2006-08-20 |
| Movie | How to Go Out on a Date in Queens | Johnny | 2006-07-28 |
| Movie | The Aristocrats | Self | 2005-07-29 |
| Series | Everybody Hates Chris | Unknown | 2005-09-22 |
| Movie | Earth to America | self | 2005-11-20 |
| Series | Bobobo-bo Bo-bobo | Unknown | 2005-10-01 |
| Series | The Tony Danza Show | Unknown | 2004-09-13 |
| Movie | The Seinfeld Story | Self | 2004-11-25 |
| Series | Listen Up! | Tony Kleinman | 2004-09-20 |
| Movie | Seinfeld: How It Began | Self/George Costanza | 2004-11-23 |
| Movie | A Christmas Carol | Jacob Marley / Marley's Ghost | 2004-11-28 |
| Series | Real Time with Bill Maher | Unknown | 2003-02-21 |
| Series | Jimmy Kimmel Live! | Unknown | 2003-01-26 |
| Movie | 101 Dalmatians II: Patch's London Adventure | Lightning (voice) | 2003-03-02 |
| Series | Two and a Half Men | Dr. Goodman | 2003-09-22 |
| Series | The Ellen DeGeneres Show | Unknown | 2003-09-08 |
| Movie | The Very Best of America's Funniest Comedians | Self (archive footage) | 2003-05-13 |
| Movie | The Hunchback of Notre Dame II | Gargoyle Hugo (voice) | 2002-02-06 |
| Series | Monk | Unknown | 2002-07-12 |
| Movie | The Man Who Saved Christmas | A.C. Gilbert | 2002-12-15 |
| Series | The Twilight Zone | Unknown | 2002-09-18 |
| Series | Make Way for Noddy | Clockwork Clown (voice) | 2002-09-02 |
| Series | Disney's House of Mouse | 2001-01-13 | |
| Series | Critics Choice Awards | Himself | 2001-01-22 |
| Movie | The Trumpet of the Swan | Father (voice) | 2001-05-11 |
| Series | Good Day Live | Unknown | 2001-09-17 |
| Series | Bob Patterson | Bob Patterson | 2001-10-02 |
| Movie | Shallow Hal | Mauricio Wilson | 2001-11-01 |
| Series | The Legend of Tarzan | Unknown | 2001-09-03 |
| Movie | Let's Rap Fire Safety | 2000-03-09 | |
| Series | Son of the Beach | Unknown | 2000-03-14 |
| Series | Curb Your Enthusiasm | Unknown | 2000-10-15 |
| Series | The Huntress | Unknown | 2000-07-26 |
| Movie | The Adventures of Rocky & Bullwinkle | Boris | 2000-06-30 |
| Movie | Jingle Bells | Elf (Voice) | 1999-01-01 |
| Movie | Sideshow: Alive on the Inside | Narrator | 1999-03-05 |
| Movie | Ultimate Trek: Star Trek's Greatest Moments | Host | 1999-12-01 |
| Movie | Love and Action in Chicago | Frank Bonner | 1999-09-15 |
| Series | The Late Late Show with Craig Kilborn | Unknown | 1999-03-30 |
| Movie | Madeline: Lost in Paris | Uncle Horst / Henri (voice) | 1999-08-02 |
| Movie | Larry David: Curb Your Enthusiasm | Self | 1999-10-17 |
| Movie | Denial | Art Witz | 1998-05-21 |
| Series | Hercules | Poseidon | 1998-08-31 |
| Movie | Titey | Titey (voice) | 1998-05-15 |
| Movie | Love! Valour! Compassion! | Buzz Hauser | 1997-05-16 |
| Movie | Cinderella | Lionel | 1997-11-02 |
| Movie | The Hunchback of Notre Dame | Gargoyle Hugo (voice) | 1996-06-21 |
| Movie | Sex, Censorship and the Silver Screen | Quote Reader | 1996-01-01 |
| Series | Muppets Tonight | Unknown | 1996-03-08 |
| Movie | Dunston Checks In | Robert Grant | 1996-01-12 |
| Movie | A Tribute to Stephen Sondheim | 1995-01-12 | |
| Movie | For Better or Worse | Michael Makeshift | 1995-03-19 |
| Movie | Bye Bye Birdie | Albert J. Peterson | 1995-12-03 |
| Movie | The Last Supper | Anti-Enviroment | 1995-09-08 |
| Series | Star Trek: Voyager | Unknown | 1995-01-16 |
| Series | Duckman | Duckman (voice) | 1994-03-05 |
| Movie | The Paper | Marion Sandusky | 1994-03-18 |
| Series | Aladdin | Abis Mal | 1994-02-06 |
| Movie | North | North's Dad | 1994-07-22 |
| Movie | Blankman | Mr. Stone | 1994-08-19 |
| Series | Friends | Earl | 1994-09-22 |
| Movie | The Return of Jafar | Abis Mal - the Chief of the Thieves (voice) | 1994-05-20 |
| Movie | Down on the Waterfront | 1994-04-26 | |
| Series | Walker, Texas Ranger | Unknown | 1993-04-21 |
| Movie | Coneheads | Larry Farber | 1993-07-23 |
| Movie | Sexual Healing | Frank | 1993-07-18 |
| Movie | I Don't Buy Kisses Anymore | Bernie Fishbine | 1992-04-24 |
| Series | The Larry Sanders Show | Unknown | 1992-08-15 |
| Series | Dinosaurs | Unknown | 1991-04-26 |
| Movie | Pretty Woman | Philip Stuckey | 1990-03-23 |
| Series | Dream On | Unknown | 1990-07-08 |
| Movie | White Palace | Neil | 1990-10-19 |
| Movie | Jacob's Ladder | Geary | 1990-11-02 |
| Series | Seinfeld | George Costanza | 1989-07-05 |
| Series | LIVE with Kelly and Mark | Unknown | 1988-09-05 |
| Series | Favorite Son | Chris Van Allen | 1988-10-30 |
| Series | Everything's Relative | Julian Beeby | 1987-10-03 |
| Movie | Brighton Beach Memoirs | Pool Player #1 | 1986-12-26 |
| Movie | The Mosquito Coast | Hardware Clerk | 1986-11-26 |
| Movie | Rockabye | Lt. Ernest Foy | 1986-01-11 |
| Series | E/R | Unknown | 1984-09-16 |
| Series | Newhart | Unknown | 1982-10-02 |
| Series | Late Night with David Letterman | Unknown | 1982-02-01 |
| Movie | The Burning | Dave | 1981-05-08 |
| Movie | Senior Trip | Pete | 1981-12-30 |
| Series | Saturday Night Live | Unknown | 1975-10-11 |
| Series | The Tonight Show Starring Johnny Carson | Unknown | 1962-10-01 |
| Series | The Emmy Awards | Unknown | 1949-01-25 |