Jason Alexander
Jay Scott Greenspan (born September 23, 1959), better known by the stage name Jason Alexander, is an American actor, comedian, director, producer, singer, and writer. Alexander is best known for his role as George Costanza on the critically acclaimed sitcom Seinfeld (1989–1998). He has also had an active career 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. He appeared in the Los Angeles production of The Producers. He is the Artistic Director of "Reprise! Broadway's Best in Los Angeles", where he has directed several musicals. He is also known as the voice of the lead character in the cult animated series Duckman (1994–1997).