Kevin Sussman (born December 4, 1970) is an American actor of television and filmperhaps best known for his recurring roles as Stuart Bloom on the CBS sitcom The Big Bang Theory and as Walter on the ABC comedy-drama Ugly Betty. Starting with the sixth season of The Big Bang Theory, he was promoted to a series regular.
Sussman is one of four brothers. He attended the College of Staten Island for one year and went on to graduate from the American Academy of Dramatic Arts in New York City. He later studied with acting teacher Uta Hagen for four years.