Mark David Duplass (born December 7, 1976) is an American film director, film producer, actor, and screenwriter. He is the brother of director and writer Jay Duplass.
Duplass was born in New Orleans, Louisiana, the son of Cynthia "Cindy" (née Ernst) and Lawrence "Larry" Duplass.
He was raised in a Catholic family, and attended Jesuit High School. Duplass has Cajun ancestry.
Duplass is married to his co-star on The League, Katie Aselton. They have two children. Duplass is considered to be one of the founders of the mumblecore aesthetic. He is Read his whole biography