Clark Duke is an American actor best known for his appearances in the Kick-Ass films, as well as Hot Tub Time Machine.

Duke found his passion for acting when he produced, wrote, and directed Clark and Michael, a web series he made with his friend Michael Cera. The pilot episode was directed by Duke as his college thesis film at Loyola Marymount University.

He made regular appearances on the television series Greek. He played the role of Dale, Rusty's Christian dorm roommate.

In 1992, Duke was nominated for a Young Artist Award's Outstanding Actor Under Ten in a Television Series award for his work on Hearts Afire. In 2008, he starred in a short film, Drunk History, Volume 2.

He appeared in the 2008 film, Sex Drive. In 2010, he was cast in Kick-Ass. The film was directed by Matthew Vaughn. He lent his voice to the 2013 animated movie The Croods, voicing Thunk.

Clark Duke was born on May 5, 1985 in Glenwood, Arkansas. He studied and graduated at Loyola Marymount University.