Jason Alexander
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.
Gallery
Known For
Acting History
2026
Jimmy as Louis B. Mayer
2025The Gettysburg Address as Noah Brooks (voice)
2025LEGO Marvel Avengers: Strange Tails as Magneto (voice)
2025The Bad Guys: Breaking In as Mysterious Figure (voice)
2025Paddy Chayefsky: Collector of Words as Self
2025Stealing Pulp Fiction as Dr. Mendelbaum
2025The Electric State as Ted / Wingman
2024Y llegaron de noche as Carl Laemmle
2023Dick Van Dyke: 98 Years of Magic as Self - Performer
2023Leo as Jayda's Dad (voice)
2023Rock, Paper, Scissors as Jonathan Fartjoke (voice)
2023History of the World: Part II as Maurice Cheeks
2022The Conspiracy
2022Killing Me Softly with His Songs as Self
2022Out of Office
2022Cinderella: The Reunion, A Special Edition of 20/20 as Self
2022Dunston Checks Out as Jason Alexander (archival footage)
2021Star Trek: Prodigy as Doctor Noum (voice)
2021Star Trek: Prodigy as Counselor Noum (voice)
2021The Problem with Jon Stewart as Jeff Bezos
2021Broadway: Beyond the Golden Age as Self
2021History of the Sitcom as Self - Actor
2021Celebrity Wheel of Fortune as Self - Contestant
2020The Rocky Horror Musical Live Stream as Narrator
2020Faith Based as Nicky Steele
2020Stars in the House as Self
2020Stars in the House as Self - Special Guest
2020My Boyfriend's Meds as Dr. Sternbach
2019Harley Quinn as Sy Borgman (voice)
2019The Movies That Made Us as Self
2019Mad About You as Jason Alexander
2018The Conners as Pastor Phil
2018The Portuguese Kid as Barry Dragonetti
2018Bucky and the Squirrels as Jason Alexander
2017Broadway: The Next Generation as Self
2017Hit the Road as Ken Swallow
2017Young Sheldon as Gene Lundy
2017The Orville as Olix
2017Kody Kapow as Goji (voice)
2017The Truth Is in the Stars as Self
2017The Marvelous Mrs. Maisel as Asher Friedman
2017Dinner with Dad as Jason Alexander
2016The Mark Lembeck Technique as Mark Lembeck
2016Best Worst Thing That Ever Could Have Happened... as Self
2016For the Love of Spock as Self
2016There's Something About Romcoms as Self
2016The $100,000 Pyramid as Self
2016Match Game as Self - Panelist
2016Tom and Jerry: Back to Oz as Mr. Bibb / The Nome King (voice)
2016To Tell the Truth as Self - Panelist
2016The Last Laugh as Self
2015The Grinder as Cliff Bemis
2015China, Il The Musical as Harold
2015Larry Gaye: Renegade Male Flight Attendant as Larry's Dad
2015Big Time in Hollywood, Fl as Jason Alexander
2015The Late Late Show with James Corden as Self
2015Misery Loves Comedy as Self
2015Wild Card as Pinky
2014Penn Zero: Part-Time Hero as Coach Wallace (voice)
2014How Murray Saved Christmas as Doc Holiday (voice)
2014Lucky Stiff as Vinnie Di Ruzzio
2014The Tom and Jerry Show as Rick (voice)
2014TripTank as Doctor (voice)
2014Late Night with Seth Meyers as Self
2013Kirstie as Stanford Temple
2013Hollywood Game Night as Self
2013Drunk History as William Tweed
2012Stars in Shorts as Sid Rosenthal
2012Comedians in Cars Getting Coffee as Self
2012Comedy Bang! Bang! as Inspector Gantlet
2012National Lampoon's Another Dirty Movie as Self (uncredited)
2012Say It Ain't Solo as Himself
2011The Voyages of Young Doctor Dolittle as Eugene (voice)
2011Talking Dead as Self
2011China, IL as Harold (voice)
2011Dora the Explorer: Dora's Enchanted Forest Adventures as Owl (voice)
2011A Fairly Odd Movie: Grow Up, Timmy Turner! as Cosmo
2011Franklin & Bash as Carter Lang
2011Harry's Law as Richard Cross
2010Not Your Time as Sid Rosenthal
2010Quantum Quest: A Cassini Space Odyssey as Moronic (voice)
2010Fish Hooks as Mr. Nibbles
2010Fish Hooks as Mr. Nibbles (voice)
2010Rock Slyde as Mailman Stan
2010The Marriage Ref as Self - Panelist
2009The Cleveland Show
2009Community as Mountain Man
2009Meteor as Dr. Chetwyn
2009Hachi: A Dog's Tale as Carl
2008Shatner's Raw Nerve as Self
2008Step It Up and Dance
2007Jerry Seinfeld: Submarine Captain as Himself
2007The Grand as Dr. Yakov Achmed
2007Thank God You're Here as Self
2006Farce of the Penguins as Penguin on Belly (voz)
2006Rachael Ray as Self - Guest
2006Talkshow with Spike Feresten
2006Comedy Central Roast of William Shatner as Self - Roastmaster
2006How to Go Out on a Date in Queens as Johnny
2006Snoop Dogg's Hood of Horror as British Record Mogul
2006Ira & Abby as Dr. Morris Saperstein
2006Where My Dogs At?
2006The New Adventures of Old Christine as Dr. Palmer
2005Earth to America as self
2005Criminal Minds as Prof. Rothchild
2005Everybody Hates Chris as Principal Edwards
2005The Aristocrats as Self
2005Robot Chicken as Krampus (voice)
2005American Dad! as Mr. Orlando (voice)
2005American Dad! as Sal (voice)
2005The Late Late Show with Craig Ferguson as Self
2004A Christmas Carol as Jacob Marley / Marley's Ghost
2004The Seinfeld Story as Self
2004Seinfeld: How It Began as Self/George Costanza
2004Kramer vs. Kramer: Kenny to Cosmo as Self
2004Listen Up! as Tony Kleinman
2004The Tony Danza Show as Self - Guest
2003Two and a Half Men as Dr. Goodman
2003The Ellen DeGeneres Show as Self
2003The Very Best of America's Funniest Comedians as Self (archive footage)
2003101 Dalmatians II: Patch's London Adventure as Lightning (voice)
2003Real Time with Bill Maher as Self
2003Jimmy Kimmel Live! as Self
2002The Man Who Saved Christmas as A.C. Gilbert
2002The Twilight Zone as Patient
2002Monk as Marty Eels
2002The Hunchback of Notre Dame II as Gargoyle Hugo (voice)
2001Being 'Shallow Hal' as Self
2001Shallow Hal as Mauricio Wilson
2001Bob Patterson as Bob Patterson
2001Good Day Live as Self
2001The Legend of Tarzan as Zutho (voice)
2001Primetime Glick
2001On Edge as Zamboni Phil
2001The Trumpet of the Swan as Father (voice)
2001Bravo Profiles: Penn and Teller as Self
2001Critics Choice Awards as Self
2001Disney's House of Mouse
2000Curb Your Enthusiasm as Jason Alexander
2000The Huntress
2000The Adventures of Rocky & Bullwinkle as Boris
2000Son of the Beach
2000Let's Rap Fire Safety
2000Malcolm in the Middle as Leonard
1999Ultimate Trek: Star Trek's Greatest Moments as Host
1999The N.Y. Friars Club Roast of Jerry Stiller as Self - Roastmaster
1999Larry David: Curb Your Enthusiasm as Self
1999Love and Action in Chicago as Frank Bonner
1999Madeline: Lost in Paris as Uncle Horst / Henri (voice)
1999The Late Late Show with Craig Kilborn as Self - Guest
1999Sideshow: Alive on the Inside as Narrator
1999Dilbert as Catbert (voice)
1999Jingle Bells as Elf (Voice)
1998Hollywood Squares as Self - Panelist
1998Hollywood Squares as Self
1998Hercules as Poseidon
1998Hercules as Poseidon (voice)
1998Denial as Art Witz
1998Titey as Titey (voice)
1997Cinderella as Lionel
1997Love! Valour! Compassion! as Buzz Hauser
1996The Hunchback of Notre Dame as Gargoyle Hugo (voice)
1996Muppets Tonight as Self
1996Remember WENN as Alan Ballinger
1996Dunston Checks In as Robert Grant
1996Sex, Censorship and the Silver Screen as Quote Reader
1995Bye Bye Birdie as Albert J. Peterson
1995The Last Supper as Anti-Enviroment
1995For Better or Worse as Michael Makeshift
1995Star Trek: Voyager as Kurros
1995A Tribute to Stephen Sondheim
1994Friends as Earl
1994Blankman as Mr. Stone
1994North as North's Dad
1994The Return of Jafar as Abis Mal - the Chief of the Thieves (voice)
1994Down on the Waterfront
1994The Paper as Marion Sandusky
1994Duckman as Duckman (voice)
1994Aladdin as Abis Mal (voice)
1994Aladdin as Captain Albatross (voice)
1994Aladdin as Abis Mal / Abnor Mal (voice)
1993The Nanny as Jack
1993Coneheads as Larry Farber
1993Sexual Healing as Frank
1993For Goodness Sake as Electronics Store Customer
1992The Larry Sanders Show as Jason Alexander
1992I Don't Buy Kisses Anymore as Bernie Fishbine
1991Dinosaurs as Grown Baby (voice)
1991Dinosaurs as Stu (voice)
1991Dinosaurs as The Job Wizard (voice)
1991Dinosaurs as Gus Molehill (voice)
1991Dinosaurs as Sexual Harris (voice)
1991Dinosaurs as General H. Norman Conquest (voice)
1991Dinosaurs as UFO! Host / Announcer (voice)
1990Jacob's Ladder as Geary
1990White Palace as Neil
1990Dream On as Randall Townsend
1990Pretty Woman as Philip Stuckey
1989The Simpsons as Bourbon Verlander (voice)
1989Seinfeld as George Costanza
1988Favorite Son as Chris Van Allen
1988LIVE with Kelly and Mark as Self - Guest
1987Everything's Relative as Julian Beeby
1986Brighton Beach Memoirs as Pool Player #1
1986The Mosquito Coast as Hardware Clerk
1986Rockabye as Lt. Ernest Foy
1984E/R as Harold Stickley
1984E/R
1984Jeopardy! as Self
1983Reading Rainbow as Self - Narrator (voice)
1982Newhart
1982Late Night with David Letterman as Self
1981Senior Trip as Pete
1981The Burning as Dave
1980A Capitol Fourth as Self
1975Saturday Night Live as Self - Host
1975Saturday Night Live as Self - Cameo (uncredited)
1956Tony Awards as Self - Presenter
1949The Emmy Awards as Self
1944Golden Globe Awards as Self - Nominee
—The Sisters Rosensweig as Mervyn
—Leo 2
—Saturday TV Funhouse as Titey (voice)