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1959Born, Newark
81Credits
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.…
Known for
Hachi: A Dog's TaleCarl
Criminal MindsProf. Rothchild
Two and a Half MenDr. Goodman
Young SheldonGene Lundy2026Mating SeasonAlan (voice) · 1 episodeShow
2025The Gettysburg AddressNoah Brooks (voice)Movie
2025LEGO Marvel Avengers: Strange TailsMagneto (voice) · 2 episodesShow
2025Stealing Pulp FictionDr. MendelbaumMovie
2025The Electric StateTed / WingmanMovie
2024Y llegaron de nocheCarl Laemmle · 7 episodesShow
2023LeoJayda's Dad (voice)Movie
2023History of the World: Part IIMaurice Cheeks · 1 episodeShow
2022The ConspiracyMovie
2022Out of OfficeMovie
2022Dunston Checks OutJason Alexander (archival footage)Movie
2021Star Trek: ProdigyDoctor Noum (voice), Counselor Noum (voice) · 16 episodesShow
2020The Rocky Horror Musical Live StreamNarratorMovie
2020Faith BasedNicky SteeleMovie
2020My Boyfriend's MedsDr. SternbachMovie
2019Harley QuinnSy Borgman (voice) · 13 episodesShow
2019Mad About YouJason Alexander · 1 episodeShow
2018The ConnersPastor Phil · 2 episodesShow
2018The Portuguese KidBarry DragonettiMovie
2018Bucky and the SquirrelsJason AlexanderMovie
2017Hit the RoadKen Swallow · 10 episodesShow
2017Young SheldonGene Lundy · 5 episodes · Director · 1 episodeShow
2017The OrvilleOlix · 2 episodesShow
2017Kody KapowGoji (voice) · 22 episodesShow
2017The Marvelous Mrs. MaiselAsher Friedman · 3 episodesShow
2017Dinner with DadJason Alexander · 8 episodes · Writer · 8 episodesShow
2016The Mark Lembeck TechniqueMark Lembeck · Consulting ProducerMovie
2016Tom and Jerry: Back to OzMr. Bibb / The Nome King (voice)Movie
2015The GrinderCliff Bemis · 4 episodesShow
2015China, Il The MusicalHaroldMovie
2015Big Time in Hollywood, FlJason Alexander · 1 episodeShow
2015Wild CardPinkyMovie
2014How Murray Saved ChristmasDoc Holiday (voice)Movie
2014Penn Zero: Part-Time HeroCoach Wallace (voice) · 1 episodeShow
2014Lucky StiffVinnie Di RuzzioMovie
2014The Tom and Jerry ShowRick (voice) · 52 episodesShow
2014TripTankDoctor (voice) · 1 episodeShow
2013KirstieStanford Temple · 1 episodeShow
2012Stars in ShortsSid RosenthalMovie
2011The Voyages of Young Doctor DolittleEugene (voice)Movie
2011China, ILHarold (voice) · 10 episodesShow
2011Dora the Explorer: Dora's Enchanted Forest AdventuresOwl (voice)Movie
2011A Fairly Odd Movie: Grow Up, Timmy Turner!CosmoMovie
2011Franklin & BashCarter Lang · 1 episodeShow
2011Harry's LawRichard Cross · 1 episodeShow
2010Not Your TimeSid RosenthalMovie
2010Mike & MollyDirector · 1 episodeShow
2010Quantum Quest: A Cassini Space OdysseyMoronic (voice)Movie
2010Fish HooksMr. Nibbles, Mr. Nibbles (voice) · 3 episodesShow
2010Rock SlydeMailman StanMovie
2009The Cleveland Show1 episodeShow
2009CommunityMountain Man · 1 episodeShow
2009MeteorDr. Chetwyn · 2 episodesShow
2009Hachi: A Dog's TaleCarlMovie
2008Step It Up and Dance1 episodeShow
2007The GrandDr. Yakov AchmedMovie
2006Farce of the PenguinsPenguin on Belly (voice)Movie
2006How to Go Out on a Date in QueensJohnnyMovie
2006Snoop Dogg's Hood of HorrorBritish Record MogulMovie
2006Ira & AbbyDr. Morris SapersteinMovie
2006Where My Dogs At?1 episodeShow
2006The New Adventures of Old ChristineDr. Palmer · 1 episodeShow
2006Campus LadiesDirector · 1 episodeShow
2005Everybody Hates ChrisPrincipal Edwards · 2 episodes · Director · 2 episodesShow
2005Robot ChickenKrampus (voice) · 1 episodeShow
2004A Christmas CarolJacob Marley / Marley's GhostMovie
2004Listen Up!Tony Kleinman · 22 episodesShow
2004Agent Cody Banks 2: Destination LondonExecutive ProducerMovie
2003Agent Cody BanksExecutive ProducerMovie
2003101 Dalmatians II: Patch's London AdventureLightning (voice)Movie
2002The Man Who Saved ChristmasA.C. GilbertMovie
2002The Twilight ZonePatient · 1 episodeShow
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