Clark Duke (born May 5, 1985) is an American actor known for his roles in the films Kick-Ass (2010), The Croods (2013), Sex Drive (2008), and Hot Tub Time Machine (2010), as well as playing Clark Green in The Office, Dale Kettlewell in Greek, and Barry in Two and a Half Men.

[3] In 1992, he was nominated for a Young Artist Award as an "Outstanding Actor Under Ten in a Television Series" for his work on Hearts Afire.

In February 2008, he starred in Volume 2 of the web video series Drunk History with Jack Black, which can be found on YouTube.

He appeared in Kick-Ass with Aaron Taylor-Johnson and Nicolas Cage, and played Jacob, the nephew of Adam Yates (John Cusack) in Hot Tub Time Machine.

Set in his home state, Duke co-starred with Liam Hemsworth, Michael Kenneth Williams, Vince Vaughn, John Malkovich, and Vivica A.