Jason Alexander
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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.
Known for
Credits
Pretty Woman (1990)
as Philip Stuckey
Hachi: A Dog's Tale (2009)
as Carl
The Electric State (2025)
as Ted / Wingman
The Hunchback of Notre Dame (1996)
as Gargoyle Hugo (voice)
Shallow Hal (2001)
as Mauricio Wilson
Wild Card (2015)
as Pinky
Leo (2023)
as Jayda's Dad (voice)
Jacob's Ladder (1990)
as Geary
The Return of Jafar (1994)
as Abis Mal - the Chief of the Thieves (voice)
101 Dalmatians II: Patch's London Adventure (2003)
as Lightning (voice)
Coneheads (1993)
as Larry Farber
The Hunchback of Notre Dame II (2002)
as Gargoyle Hugo (voice)
Jimmy (2026)
as Louis B. Mayer
The Mosquito Coast (1986)
as Hardware Clerk
The Trumpet of the Swan (2001)
as Father (voice)
White Palace (1990)
as Neil
North (1994)
as North's Dad
Dunston Checks In (1996)
as Robert Grant
The Paper (1994)
as Marion Sandusky
A Fairly Odd Movie: Grow Up, Timmy Turner! (2011)
as Cosmo
The Gettysburg Address (2025)
as Noah Brooks (voice)
National Lampoon's Another Dirty Movie (2012)
as Self (uncredited)
The Adventures of Rocky & Bullwinkle (2000)
as Boris
The Last Supper (1995)
as Anti-Enviroment
The Burning (1981)
as Dave
For the Love of Spock (2016)
as Self
Tom and Jerry: Back to Oz (2016)
as Mr. Bibb / The Nome King (voice)
The Aristocrats (2005)
as Self
Blankman (1994)
as Mr. Stone
Farce of the Penguins (2006)
as Penguin on Belly (voice)
Love! Valour! Compassion! (1997)
as Buzz Hauser
Madeline: Lost in Paris (1999)
as Uncle Horst / Henri (voice)
Kramer vs. Kramer: Kenny to Cosmo (2004)
as Self
Brighton Beach Memoirs (1986)
as Pool Player #1
For Better or Worse (1995)
as Michael Makeshift
Misery Loves Comedy (2015)
as Self
Cinderella (1997)
as Lionel
Stars in Shorts (2012)
as Sid Rosenthal
Quantum Quest: A Cassini Space Odyssey (2010)
as Moronic (voice)
The Grand (2007)
as Dr. Yakov Achmed
Broadway: The Next Generation (—)
as Self
The Truth Is in the Stars (2017)
as Self
Leo 2 (—)
Actor
China, Il The Musical (2015)
as Harold
There's Something About Romcoms (2016)
as Self
Snoop Dogg's Hood of Horror (2006)
as British Record Mogul
Larry Gaye: Renegade Male Flight Attendant (2015)
as Larry's Dad
I Don't Buy Kisses Anymore (1992)
as Bernie Fishbine
Larry David: Curb Your Enthusiasm (1999)
as Self
The Last Laugh (2016)
as Self (archive footage) (uncredited)
My Boyfriend's Meds (2020)
as Dr. Sternbach
Paddy Chayefsky: Collector of Words (2025)
as Self
Stealing Pulp Fiction (2025)
as Dr. Mendelbaum
The Sisters Rosensweig (—)
as Mervyn
Jingle Bells (1999)
as Elf (Voice)
Ira & Abby (2006)
as Dr. Morris Saperstein
Broadway: Beyond the Golden Age (2021)
as Self
Killing Me Softly with His Songs (2022)
as Self
Dick Van Dyke: 98 Years of Magic (2023)
as Self - Performer
Bye Bye Birdie (1995)
as Albert J. Peterson
On Edge (2001)
as Zamboni Phil
Bucky and the Squirrels (2018)
as Jason Alexander
How Murray Saved Christmas (2014)
as Doc Holiday (voice)
Earth to America (2005)
as self
Out of Office (2022)
Actor
Seinfeld: How It Began (2004)
as Self/George Costanza
A Christmas Carol (2004)
as Jacob Marley / Marley's Ghost
The Man Who Saved Christmas (2002)
as A.C. Gilbert
For Goodness Sake (1993)
as Electronics Store Customer
Down on the Waterfront (1994)
Actor
Being 'Shallow Hal' (2001)
as Self
Sideshow: Alive on the Inside (1999)
as Narrator
How to Go Out on a Date in Queens (2006)
as Johnny
The Rocky Horror Musical Live Stream (2020)
as Narrator
Love and Action in Chicago (1999)
as Frank Bonner
The Conspiracy (2022)
Actor
A Tribute to Stephen Sondheim (1995)
Actor
Faith Based (2020)
as Nicky Steele
Best Worst Thing That Ever Could Have Happened... (2016)
as Self
Bravo Profiles: Penn and Teller (2001)
as Self
Let's Rap Fire Safety (2000)
Actor
Not Your Time (2010)
as Sid Rosenthal
The Voyages of Young Doctor Dolittle (2011)
as Eugene (voice)
Comedy Central Roast of William Shatner (2006)
as Self - Roastmaster
Sexual Healing (1993)
as Frank
Denial (1998)
as Art Witz
The Portuguese Kid (2018)
as Barry Dragonetti
Cinderella: The Reunion, A Special Edition of 20/20 (2022)
as Self
Dunston Checks Out (2022)
as Jason Alexander (archival footage)
The Seinfeld Story (2004)
as Self
Jerry Seinfeld: Submarine Captain (2007)
as Self
Say It Ain't Solo (2012)
as Self
Senior Trip (1981)
as Pete
Rockabye (1986)
as Lt. Ernest Foy
The Very Best of America's Funniest Comedians (2003)
as Self (archive footage)
Titey (1998)
as Titey (voice)
Rock Slyde (2010)
as Mailman Stan
The N.Y. Friars Club Roast of Jerry Stiller (1999)
as Self - Roastmaster
Dora the Explorer: Dora's Enchanted Forest Adventures (2011)
as Owl (voice)
The Making of Disney's The Hunchback of Notre Dame (1996)
Actor
Lucky Stiff (2014)
as Vinnie Di Ruzzio
The Mark Lembeck Technique (2016)
as Mark Lembeck
Ultimate Trek: Star Trek's Greatest Moments (1999)
as Host