He was granted a full scholarship to the School of Fine Arts at Boston University and studied there for 2 years, up until he was offered to play in film “The Burning” (1981) and in “Senior Trip” TV-movie. However, his first break through occurred in a Broadway revival of “Fiddler of the Roof” and in “Funny Thing Happened on the Way to Forum”. In 1989 Jason was awarded a Tony for Best Performance as a “Leading Actor in a Musical” for “Jerome Robbins” Broadway play. While in his theatrical carrier everything was going great, he also appeared in some movies and TV series such as “Peter Weir’s Mosquito Coast”(1986), “Jacob’s Ladder”(1990), in Julia Roberts star vehicle “Pretty Woman”(1900) and in NBC little series “Favorite Son”(1988). Soon, he starred in “Seinfeld” in a role of George Costanza, a neurotic best friend of misfortunate stand-up comedian Seinfeld. Acting in this show brought him a huge number of awards and nominations from American Comedy, Screen Actors Guild, Emmy and Golden Globe. In addition to that, he appeared in a couple of other sitcoms: “Shallow Hall” (2001), “Listen Up!” (2004 -2005), and then he co-starred with Martin Shot “The Producers” (2003) musical .According to Jason Alexander, he ended up being a comedian actor, because his teacher gave him one look and said: “Son, I know that your heart lays towards Hamlet, but you would never be a Hamlet”. As we see, he made a great choice: this famous actor is still loved by millions of Americans.

His voicing career started from ABC puppet show “Dinosaurs” (1991-1993). Jason got the taste of it and voiced Abis Mal in “Aladdin” (1993) and Hugo in “The Hunchback of Notre Dame” (1996), Sal in “American Dad” (2010), Saul Freedman in “The Cleveland Show” (2010), Brandon in the “Glen Martin DDS”(2011), Rick in “The Tom and Jerry Show” (2014).In 2012 he has also voiced a video game “Kingdom Hearts 3D: Dream Drop Distance.

Despite his age, he still works a lot and donates a lot of money to charity. His most recent films are “Franklin and Bash” (2011), “Harry’s Law” (2011), “China, IL” (2011), “A fairly odd movie: Grow up, Timmy Turner!” (2011), “Two and a Half Men” (2012), “Community” (2013), “Hollywood Game Night” (2013), “Kirstie” (2014), “Drunk History” (2015) and “The Grinder” (2015). His donations support Society for the Prevention of Cruelty to Animals, Autism Speaks, OneVoice, and Aid for AIDS.

He is married to screenwriter Deena E. Title. The couple has two children: Gabriel, born in 1991, and Noah, born in 1996.