Jason Alexander
Acting
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
2026Jimmy
Louis B. Mayer
2025The Electric State
Ted / Wingman
2025Stealing Pulp Fiction
Dr. Mendelbaum
2025The Gettysburg Address
Noah Brooks (voice)
2025Paddy Chayefsky: Collector of Words
Self
2023Leo
Jayda's Dad (voice)
2023Dick Van Dyke: 98 Years of Magic
Self - Performer
2022Cinderella: The Reunion, A Special Edition of 20/20
Self
2022Out of Office
2022Killing Me Softly with His Songs
Self
2022The Conspiracy
2022Dunston Checks Out
Jason Alexander (archival footage)
2021Broadway: Beyond the Golden Age
Self
2020My Boyfriend's Meds
Dr. Sternbach
2020Faith Based
Nicky Steele
2020The Rocky Horror Musical Live Stream
Narrator
2018Bucky and the Squirrels
Jason Alexander
2018The Portuguese Kid
Barry Dragonetti
2017The Truth Is in the Stars
Self
2016There's Something About Romcoms
Self
2016The Last Laugh
Self (archive footage) (uncredited)
2016For the Love of Spock
Self
2016Best Worst Thing That Ever Could Have Happened...
Self
2016Tom and Jerry: Back to Oz
Mr. Bibb / The Nome King (voice)
