Jay Scott Greenspan (born September 23, 1959), known professionally as Jason Alexander, is an American actor, comedian, film director, and television presenter. He is best known for his role as George Costanza in the television series Seinfeld (1989–1998), for which he was nominated for seven consecutive Primetime Emmy Awards and four Golden Globe Awards. His other well-known roles include Phillip Stuckey in the film Pretty Woman (1990), comic relief gargoyle Hugo in the Disney animated feature The Hunchback of Notre Dame (1996), and the title character in the animated series Duckman (1994–1997). He has also made guest appearances on shows such as Dream On (1994), Curb Your Enthusiasm (2001, 2009), and The Marvelous Mrs. Maisel (2019). For his role in Dream On, he was nominated for a Primetime Emmy Award for Outstanding Guest Actor in a Comedy Series. He eventually won the Daytime Emmy Award for Outstanding Original Song in 2020 for “The Bad Guys?” On Brainwashed By Toons.
Alexander has been active on stage, appearing in several Broadway musicals, including Jerome Robbins’ Broadway in 1989, for which he won the Tony Award as Best Leading Actor in a Musical and a Grammy Award for Best Musical Theater Album. He appeared in the Los Angeles production of The Producers. He was the artistic director of “Reprise! Broadway’s Best in Los Angeles”, where he has directed several musicals.