Jason Greenspan adopted the stage name Jason Alexander while still in high school in New Jersey. He was soon appearing in Broadway plays and movies, then in the hit TV series, Seinfeld, from 1990 to 1998. Alexander also directs and produces films.


Was a 1977 graduate of Livingston High School in Livingston, New Jersey. One of his classmates was Julia Montgomery. They co-starred in numerous high school productions. High school acting credits include the shows "Guys and Dolls", "The Odd Couple" and "Oliver". Parents Ruth and Alex Greenspan; half-sister Karen Van Horn, half-brother Michael Greenspan. Two children (Gabriel, born August 1991, and Noah, born February 1996) Fall 2002: Set to teach acting on the faculty of the University of Southern California as the first-ever George Burns Distinguished Visiting Professor in Performance. One year for his birthday, his friends took him to a diner. They told him to close his eyes. When he opened them, William Shatner, aka Captain James T. Kirk, was in front of him. Captain Kirk was Jason's childhood hero. Says he took on the role of Duckman because Duckman was "the anti George Costanza". 2005: Celebrity Judge for UCLA Spring Sing. The only of the four main actors (Michael Richards, Jerry Seinfeld and Julia Louis-Dreyfus) from "Seinfeld" (1990) not to win an Emmy for their work on the show Beat out Danny DeVito, Steve Buscemi and Nathan Lane for the role of "George" on "Seinfeld" (1990). The only major cast member of "Seinfeld" (1990) to also direct an episode of the series.