Actor profile

Jason Alexander

23rd September 1959 Newark, New Jersey, USA 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.

102 Movies 105 TV Shows 1 In Production 208 Credits

Filmography

Movies & TV Shows

The Gettysburg Address poster

The Gettysburg Address 19th November 2025 as Noah Brooks (voice)

Paddy Chayefsky: Collector of Words poster

Paddy Chayefsky: Collector of Words 27th July 2025 as Self

Stealing Pulp Fiction poster

Stealing Pulp Fiction 27th June 2025 as Dr. Mendelbaum

The Electric State poster

The Electric State 7th March 2025 as Ted / Wingman

Dick Van Dyke: 98 Years of Magic poster

Dick Van Dyke: 98 Years of Magic 21st December 2023 as Self - Performer

Leo poster

Leo 17th November 2023 as Jayda's Dad (voice)

The Conspiracy poster

The Conspiracy 17th November 2022

Killing Me Softly with His Songs poster

Killing Me Softly with His Songs 10th November 2022 as Self

Out of Office poster

Out of Office 5th September 2022

Cinderella: The Reunion, A Special Edition of 20/20 poster

Cinderella: The Reunion, A Special Edition of 20/20 23rd August 2022 as Self

Dunston Checks Out poster

Dunston Checks Out 1st February 2022 as Jason Alexander (archival footage)

Broadway: Beyond the Golden Age poster

Broadway: Beyond the Golden Age 14th August 2021 as Self

The Rocky Horror Musical Live Stream poster

The Rocky Horror Musical Live Stream 31st October 2020 as Narrator

Faith Based poster

Faith Based 9th October 2020 as Nicky Steele

My Boyfriend's Meds poster

My Boyfriend's Meds 14th February 2020 as Dr. Sternbach

The Portuguese Kid poster

The Portuguese Kid 14th February 2018 as Barry Dragonetti

Bucky and the Squirrels poster

Bucky and the Squirrels 26th January 2018 as Jason Alexander

The Truth Is in the Stars poster

The Truth Is in the Stars 1st May 2017 as Self

The Mark Lembeck Technique poster

The Mark Lembeck Technique 2nd December 2016 as Mark Lembeck

Best Worst Thing That Ever Could Have Happened... poster

Best Worst Thing That Ever Could Have Happened... 18th November 2016 as Self

For the Love of Spock poster

For the Love of Spock 9th September 2016 as Self

There's Something About Romcoms poster

There's Something About Romcoms 20th August 2016 as Self

Tom and Jerry: Back to Oz poster

Tom and Jerry: Back to Oz 21st June 2016 as Mr. Bibb / The Nome King (voice)

The Last Laugh poster

The Last Laugh 18th April 2016 as Self (archive footage) (uncredited)

China, Il The Musical poster

China, Il The Musical 14th June 2015 as Harold

Larry Gaye: Renegade Male Flight Attendant poster

Larry Gaye: Renegade Male Flight Attendant 5th June 2015 as Larry's Dad

Misery Loves Comedy poster

Misery Loves Comedy 23rd January 2015 as Self

Wild Card poster

Wild Card 14th January 2015 as Pinky

How Murray Saved Christmas poster

How Murray Saved Christmas 5th December 2014 as Doc Holiday (voice)

Lucky Stiff poster

Lucky Stiff 8th October 2014 as Vinnie Di Ruzzio

Stars in Shorts poster

Stars in Shorts 28th September 2012 as Sid Rosenthal

National Lampoon's Another Dirty Movie poster

National Lampoon's Another Dirty Movie 25th April 2012 as Self (uncredited)

Say It Ain't Solo 1st April 2012 as Self

The Voyages of Young Doctor Dolittle poster

The Voyages of Young Doctor Dolittle 1st November 2011 as Eugene (voice)

Dora the Explorer: Dora's Enchanted Forest Adventures poster

Dora the Explorer: Dora's Enchanted Forest Adventures 13th September 2011 as Owl (voice)

A Fairly Odd Movie: Grow Up, Timmy Turner! poster

A Fairly Odd Movie: Grow Up, Timmy Turner! 9th July 2011 as Cosmo

Not Your Time poster

Not Your Time 24th September 2010 as Sid Rosenthal

Quantum Quest: A Cassini Space Odyssey poster

Quantum Quest: A Cassini Space Odyssey 17th September 2010 as Moronic (voice)

Rock Slyde poster

Rock Slyde 1st May 2010 as Mailman Stan

Hachi: A Dog's Tale poster

Hachi: A Dog's Tale 8th June 2009 as Carl

Jerry Seinfeld: Submarine Captain poster

Jerry Seinfeld: Submarine Captain 2nd July 2007 as Self

The Grand poster

The Grand 7th June 2007 as Dr. Yakov Achmed

Farce of the Penguins poster

Farce of the Penguins 1st December 2006 as Penguin on Belly (voz)

Comedy Central Roast of William Shatner poster

Comedy Central Roast of William Shatner 20th August 2006 as Self - Roastmaster

How to Go Out on a Date in Queens poster

How to Go Out on a Date in Queens 28th July 2006 as Johnny

Snoop Dogg's Hood of Horror poster

Snoop Dogg's Hood of Horror 27th June 2006 as British Record Mogul

Ira & Abby poster

Ira & Abby 23rd June 2006 as Dr. Morris Saperstein

Earth to America poster

Earth to America 20th November 2005 as self

The Aristocrats poster

The Aristocrats 29th July 2005 as Self

A Christmas Carol poster

A Christmas Carol 28th November 2004 as Jacob Marley / Marley's Ghost

The Seinfeld Story poster

The Seinfeld Story 25th November 2004 as Self

Kramer vs. Kramer: Kenny to Cosmo 23rd November 2004 as Self

Seinfeld: How It Began poster

Seinfeld: How It Began 23rd November 2004 as Self/George Costanza

The Very Best of America's Funniest Comedians poster

The Very Best of America's Funniest Comedians 13th May 2003 as Self (archive footage)

101 Dalmatians II: Patch's London Adventure poster

101 Dalmatians II: Patch's London Adventure 2nd March 2003 as Lightning (voice)

The Man Who Saved Christmas poster

The Man Who Saved Christmas 15th December 2002 as A.C. Gilbert

The Hunchback of Notre Dame II poster

The Hunchback of Notre Dame II 6th February 2002 as Gargoyle Hugo (voice)

Being 'Shallow Hal' poster

Being 'Shallow Hal' 6th November 2001 as Self

Shallow Hal poster

Shallow Hal 1st November 2001 as Mauricio Wilson

On Edge poster

On Edge 17th June 2001 as Zamboni Phil

The Trumpet of the Swan poster

The Trumpet of the Swan 11th May 2001 as Father (voice)

Bravo Profiles: Penn and Teller poster

Bravo Profiles: Penn and Teller 24th January 2001 as Self

The Adventures of Rocky & Bullwinkle poster

The Adventures of Rocky & Bullwinkle 30th June 2000 as Boris

Let's Rap Fire Safety poster

Let's Rap Fire Safety 9th March 2000

Ultimate Trek: Star Trek's Greatest Moments poster

Ultimate Trek: Star Trek's Greatest Moments 1st December 1999 as Host

The N.Y. Friars Club Roast of Jerry Stiller poster

The N.Y. Friars Club Roast of Jerry Stiller 27th October 1999 as Self - Roastmaster

Larry David: Curb Your Enthusiasm poster

Larry David: Curb Your Enthusiasm 17th October 1999 as Self

Love and Action in Chicago poster

Love and Action in Chicago 15th September 1999 as Frank Bonner

Madeline: Lost in Paris poster

Madeline: Lost in Paris 2nd August 1999 as Uncle Horst / Henri (voice)

Sideshow: Alive on the Inside poster

Sideshow: Alive on the Inside 5th March 1999 as Narrator

Jingle Bells poster

Jingle Bells 1st January 1999 as Elf (Voice)

Denial poster

Denial 21st May 1998 as Art Witz

Titey poster

Titey 15th May 1998 as Titey (voice)

Cinderella poster

Cinderella 2nd November 1997 as Lionel

Love! Valour! Compassion! poster

Love! Valour! Compassion! 16th May 1997 as Buzz Hauser

The Hunchback of Notre Dame poster

The Hunchback of Notre Dame 21st June 1996 as Gargoyle Hugo (voice)

The Making of Disney's The Hunchback of Notre Dame poster

The Making of Disney's The Hunchback of Notre Dame 19th June 1996

Dunston Checks In poster

Dunston Checks In 12th January 1996 as Robert Grant

Bye Bye Birdie poster

Bye Bye Birdie 3rd December 1995 as Albert J. Peterson

The Last Supper poster

The Last Supper 8th September 1995 as Anti-Enviroment

For Better or Worse poster

For Better or Worse 19th March 1995 as Michael Makeshift

A Tribute to Stephen Sondheim poster

A Tribute to Stephen Sondheim 12th January 1995

The Return of Jafar poster

The Return of Jafar 15th December 1994 as Abis Mal - the Chief of the Thieves (voice)

Blankman poster

Blankman 19th August 1994 as Mr. Stone

North poster

North 22nd July 1994 as North's Dad

Down on the Waterfront poster

Down on the Waterfront 26th April 1994

The Paper poster

The Paper 18th March 1994 as Marion Sandusky

Coneheads poster

Coneheads 23rd July 1993 as Larry Farber

Sexual Healing poster

Sexual Healing 18th July 1993 as Frank

For Goodness Sake poster

For Goodness Sake 1st January 1993 as Electronics Store Customer

I Don't Buy Kisses Anymore poster

I Don't Buy Kisses Anymore 24th April 1992 as Bernie Fishbine

Jacob's Ladder poster

Jacob's Ladder 2nd November 1990 as Geary

White Palace poster

White Palace 19th October 1990 as Neil

Pretty Woman poster

Pretty Woman 23rd March 1990 as Philip Stuckey

Brighton Beach Memoirs poster

Brighton Beach Memoirs 26th December 1986 as Pool Player #1

The Mosquito Coast poster

The Mosquito Coast 26th November 1986 as Hardware Clerk

Rockabye poster

Rockabye 11th January 1986 as Lt. Ernest Foy

Senior Trip poster

Senior Trip 30th December 1981 as Pete

The Burning poster

The Burning 8th May 1981 as Dave

Broadway: The Next Generation poster

Broadway: The Next Generation as Self

Leo 2 poster

Leo 2

The Sisters Rosensweig poster

The Sisters Rosensweig as Mervyn

LEGO Marvel Avengers: Strange Tails poster

LEGO Marvel Avengers: Strange Tails 14th November 2025 as Magneto (voice)

The Bad Guys: The Series poster

The Bad Guys: The Series 6th November 2025 as D.B. Cougar (voice)

Y llegaron de noche poster

Y llegaron de noche 4th October 2024 as Carl Laemmle

Rock, Paper, Scissors poster

Rock, Paper, Scissors 22nd August 2023 as Jonathan Fartjoke (voice)

History of the World: Part II poster

History of the World: Part II 6th March 2023 as Maurice Cheeks

Star Trek: Prodigy poster

Star Trek: Prodigy 28th October 2021 as Counselor Noum (voice)

The Problem with Jon Stewart poster

The Problem with Jon Stewart 30th September 2021 as Jeff Bezos

History of the Sitcom poster

History of the Sitcom 11th July 2021 as Self - Actor

Celebrity Wheel of Fortune poster

Celebrity Wheel of Fortune 7th January 2021 as Self - Contestant

Stars in the House poster

Stars in the House 16th March 2020 as Self - Special Guest

Harley Quinn poster

Harley Quinn 29th November 2019 as Sy Borgman (voice)

The Movies That Made Us poster

The Movies That Made Us 29th November 2019 as Self

Mad About You poster

Mad About You 20th November 2019 as Jason Alexander

The Conners poster

The Conners 16th October 2018 as Pastor Phil

Hit the Road poster

Hit the Road 17th October 2017 as Ken Swallow

Young Sheldon poster

Young Sheldon 25th September 2017 as Gene Lundy

The Orville poster

The Orville 10th September 2017 as Olix

Kody Kapow poster

Kody Kapow 15th July 2017 as Goji (voice)

The Marvelous Mrs. Maisel poster

The Marvelous Mrs. Maisel 16th March 2017 as Asher Friedman

Dinner with Dad poster

Dinner with Dad 10th March 2017 as Jason Alexander

The $100,000 Pyramid poster

The $100,000 Pyramid 27th June 2016 as Self

Match Game poster

Match Game 26th June 2016 as Self - Panelist

To Tell the Truth poster

To Tell the Truth 14th June 2016 as Self - Panelist

The Grinder poster

The Grinder 29th September 2015 as Cliff Bemis

Big Time in Hollywood, Fl poster

Big Time in Hollywood, Fl 25th March 2015 as Jason Alexander

The Late Late Show with James Corden poster

The Late Late Show with James Corden 23rd March 2015 as Self

Penn Zero: Part-Time Hero poster

Penn Zero: Part-Time Hero 5th December 2014 as Coach Wallace (voice)

The Tom and Jerry Show poster

The Tom and Jerry Show 9th April 2014 as Rick (voice)

TripTank poster

TripTank 2nd April 2014 as Doctor (voice)

Late Night with Seth Meyers poster

Late Night with Seth Meyers 25th February 2014 as Self - Guest

Kirstie poster

Kirstie 4th December 2013 as Stanford Temple

Hollywood Game Night poster

Hollywood Game Night 11th July 2013 as Self

Drunk History poster

Drunk History 9th July 2013 as William Tweed

Comedians in Cars Getting Coffee poster

Comedians in Cars Getting Coffee 19th July 2012 as Self

Comedy Bang! Bang! poster

Comedy Bang! Bang! 8th June 2012 as Inspector Gantlet

Talking Dead poster

Talking Dead 16th October 2011 as Self

China, IL poster

China, IL 2nd October 2011 as Harold (voice)

Franklin & Bash poster

Franklin & Bash 1st June 2011 as Carter Lang

Harry's Law poster

Harry's Law 17th January 2011 as Richard Cross

Fish Hooks poster

Fish Hooks 3rd September 2010 as Mr. Nibbles (voice)

The Marriage Ref 28th February 2010 as Self - Panelist

The Cleveland Show poster

The Cleveland Show 27th September 2009

Community poster

Community 17th September 2009 as Mountain Man

Meteor poster

Meteor 12th July 2009 as Dr. Chetwyn

Shatner's Raw Nerve poster

Shatner's Raw Nerve 2nd December 2008 as Self

Step It Up and Dance 3rd April 2008

Thank God You're Here poster

Thank God You're Here 9th April 2007 as Self

Rachael Ray poster

Rachael Ray 18th September 2006 as Self - Guest

Talkshow with Spike Feresten poster

Talkshow with Spike Feresten 16th September 2006

Where My Dogs At? 10th June 2006

The New Adventures of Old Christine poster

The New Adventures of Old Christine 13th March 2006 as Dr. Palmer

Criminal Minds poster

Criminal Minds 22nd September 2005 as Prof. Rothchild

Everybody Hates Chris poster

Everybody Hates Chris 22nd September 2005 as Principal Edwards

Robot Chicken poster

Robot Chicken 20th February 2005 as Krampus (voice)

American Dad! poster

American Dad! 6th February 2005 as Sal (voice)

The Late Late Show with Craig Ferguson poster

The Late Late Show with Craig Ferguson 3rd January 2005 as Self

Listen Up! poster

Listen Up! 20th September 2004 as Tony Kleinman

The Tony Danza Show 13th September 2004 as Self - Guest

Two and a Half Men poster

Two and a Half Men 22nd September 2003 as Dr. Goodman

The Ellen DeGeneres Show poster

The Ellen DeGeneres Show 8th September 2003 as Self

Real Time with Bill Maher poster

Real Time with Bill Maher 21st February 2003 as Self

Jimmy Kimmel Live! poster

Jimmy Kimmel Live! 26th January 2003 as Self

The Twilight Zone poster

The Twilight Zone 18th September 2002 as Patient

Monk poster

Monk 12th July 2002 as Marty Eels

Bob Patterson poster

Bob Patterson 2nd October 2001 as Bob Patterson

Good Day Live 17th September 2001 as Self

The Legend of Tarzan poster

The Legend of Tarzan 3rd September 2001 as Zutho (voice)

Primetime Glick poster

Primetime Glick 20th June 2001

Critics Choice Awards poster

Critics Choice Awards 22nd January 2001 as Self

Disney's House of Mouse poster

Disney's House of Mouse 13th January 2001

Curb Your Enthusiasm poster

Curb Your Enthusiasm 15th October 2000 as Jason Alexander

The Huntress poster

The Huntress 26th July 2000

Son of the Beach poster

Son of the Beach 14th March 2000

Malcolm in the Middle poster

Malcolm in the Middle 9th January 2000 as Leonard

The Late Late Show with Craig Kilborn poster

The Late Late Show with Craig Kilborn 30th March 1999 as Self - Guest

Dilbert poster

Dilbert 25th January 1999 as Catbert (voice)

Hollywood Squares poster

Hollywood Squares 14th September 1998 as Self - Panelist

Hercules poster

Hercules 31st August 1998 as Poseidon (voice)

Muppets Tonight poster

Muppets Tonight 8th March 1996 as Self

Remember WENN poster

Remember WENN 13th January 1996 as Alan Ballinger

Star Trek: Voyager poster

Star Trek: Voyager 16th January 1995 as Kurros

Friends poster

Friends 22nd September 1994 as Earl

Duckman poster

Duckman 5th March 1994 as Duckman (voice)

Aladdin poster

Aladdin 6th February 1994 as Abis Mal / Abnor Mal (voice)

The Nanny poster

The Nanny 3rd November 1993 as Jack

The Larry Sanders Show poster

The Larry Sanders Show 15th August 1992 as Jason Alexander

Dinosaurs poster

Dinosaurs 26th April 1991 as UFO! Host / Announcer (voice)

Dream On poster

Dream On 8th July 1990 as Randall Townsend

The Simpsons poster

The Simpsons 17th December 1989 as Bourbon Verlander (voice)

Seinfeld poster

Seinfeld 5th July 1989 as George Costanza

Favorite Son poster

Favorite Son 30th October 1988 as Chris Van Allen

LIVE with Kelly and Mark poster

LIVE with Kelly and Mark 5th September 1988 as Self - Guest

Everything's Relative poster

Everything's Relative 3rd October 1987 as Julian Beeby

E/R poster

E/R 16th September 1984

Jeopardy! poster

Jeopardy! 10th September 1984 as Self

Reading Rainbow poster

Reading Rainbow 6th June 1983 as Self - Narrator (voice)

Newhart poster

Newhart 2nd October 1982

Late Night with David Letterman poster

Late Night with David Letterman 1st February 1982 as Self

A Capitol Fourth poster

A Capitol Fourth 4th July 1980 as Self

Saturday Night Live poster

Saturday Night Live 11th October 1975 as Titey (voice)

People's Choice Awards poster

People's Choice Awards 4th March 1975 as Self - Host

Tony Awards poster

Tony Awards 1st April 1956 as Self - Presenter

The Emmy Awards poster

The Emmy Awards 25th January 1949 as Self

Golden Globe Awards poster

Golden Globe Awards 20th January 1944 as Self - Nominee

Saturday TV Funhouse poster

Saturday TV Funhouse as Titey (voice)

Jimmy poster

Coming soon

Jimmy 20th November 2026 as Louis B. Mayer