Mark David Duplass (born December 7, 1976) is an American film director,
film producer, actor, musician and screenwriter. He is the brother of director, writer, and actor
Jay Duplass. Together, the brothers started the film production company
Duplass Brothers Productions, and have directed films such as
The Puffy Chair (2005),
Jeff, Who Lives at Home (2011), and
The Do-Deca-Pentathlon (2012). Mark and Jay co-created the
HBO television series
Togetherness in 2015. He is married to his
The League co-star
Katie Aselton.