Kevin Sussman (born December 4, 1970) is an American actor of television and film perhaps best known for his recurring roles as "Stuart Bloom" on The Big Bang Theory and as "Walter" on the now defunct comedy-drama Ugly Betty. Starting with season 6 of The Big Bang Theory, he was promoted to 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.