George Louis Costanza is a character in the American television sitcom Seinfeld (1989–1998), played by Jason Alexander. He has variously been described as a "short, stocky, slow-witted, bald man" (by Elaine Benes and Costanza himself) and "Lord of the Idiots" (by Costanza himself). George and Jerry were junior high school friends and remained friends afterwards. He is friends with Jerry Seinfeld, Cosmo Kramer, and Elaine Benes. George appears in every episode except "The Pen" (third season).
The character was originally based on Seinfeld co-creator Larry David but is surnamed after Jerry Seinfeld's real-life New York friend, Mike Costanza. Alexander reprised his role in an episode of Comedians in Cars Getting Coffee, reuniting with Jerry Seinfeld and Wayne Knight (also reprising their roles as Jerry and Newman, respectively).
George is the son of Frank (Jerry Stiller), an Italian-American and Estelle Costanza (Estelle Harris), presumably Jewish-American. George twice mentions that he has a brother (although never again after season 3). Lloyd Braun is his childhood nemesis who George feels was the son his parents always wanted. George's best friend Jerry Seinfeld described Frank and Estelle as "psychopaths", and said in "The Chinese Woman" that, if they had divorced when George was young, he "could have been normal". George also describes himself (and by implication many neuroses) as the result of his parents having stayed together.
In "The Junior Mint", he states he grew up in Brooklyn, New York, where he went to a public school. In a previous episode he mentions he went to high school on Long Island. He met Jerry during his youth, and they remained friends from that point on. George and Jerry both attended John F. Kennedy High School, class of 1971. During their high school years, George and Jerry frequently hung out at a pizzeria called Mario's Pizzas, where the former, having the highest score "GLC", would play Frogger. George was picked on by his gym teacher Mr. Heyman (Biff Yeager), who deliberately mispronounced his name as "Can't stand ya" and gave him wedgies.
Two of George's cousins appear on the show: Shelly, who briefly appears in "The Contest", and Rhisa, who George plans to date in order to shock his parents in "The Junk Mail". George talks to his parents about his family in "The Money", during which it is revealed that he had an "Uncle Moe", who "died a young man" and an "Aunt Baby", who died at the age seven of internal problems. It is also revealed that his mother has a "Cousin Henny". In "The Doll", it is revealed that Frank Costanza was born in Italy and has a cousin, Carlo, who still lives there. As of "The Robbery", George had living grandparents who he had recently visited, although it is never made clear whether these were his mom's or dad's parents.