Brian Thomas Smith

Brian Thomas Smith (born May 13, 1977) is an American actor and comedian known for playing the dim-witted but kind-hearted Zack Johnson in The Big Bang Theory for nine seasons. He has also made other TV appearances on Fear Factor, Two and a Half Men, Happy Endings, The Neighborhood, 9-1-1: Lone Star, and United States of Al. On the big screen, Smith starred opposite Al Pacino and Annette Bening in Dan Fogelman's directoral debut film, Danny Collins. Other films Smith has starred in include Lethal Seduction, Babysplitters, The Wedding Party, and Concrete Blondes. Early life Smith has a younger brother, Greg, who participated with him on The Amazing Race 7. Smith graduated from Central Missouri State University (he was also a member of the Sigma Phi Epsilon Fraternity) before moving to Los Angeles. He was a member of the sketch comedy troupe, The Exploding Pajamas. Smith is of English, Welsh, Irish, German, Cherokee, and Ashkenazi-Jewish descent.