Dax Randall Shepard is an American actor, writer, director and podcast host. He is best known for his work in the feature films Without a Paddle, Zathura: A Space Adventure, Employee of the Month, Idiocracy, Let's Go to Prison, Hit and Run, and CHiPs, the last pair of which he also wrote and directed, the MTV practical joke reality series Punk'd. He portrayed Crosby Braverman in the NBC comedy-drama series Parenthood from 2010 to 2015.