EXCLUSIVE: Mark Duplass rounds out four leads in Togetherness, HBO’s single-camera comedy pilot written, directed and executive produced by Duplass and his brother Jay Duplass. Mark Duplass, who is a known actor, originally was not attached to star in the project as he is pretty busy in front of the camera in TV. He stars on FX’s comedy The League and recurs on Fox’s The Mindy Project. Now he is taking on a lead in Togetherness as a regular while continuing on The League. Togetherness, which stars Amanda Peet, Mark Duplass, Melanie Lynskey and Steve Zissis, follows two couples living under the same roof who struggle to keep their relationships alive while pursuing their individual dreams. The foursome consists of Tina Morris (Peet) who relocates from Houston to Los Angeles and moves in with her sister Michelle Pierson (Lynskey) and her husband Brett (Duplass). Also moving in with the Piersons is Brett’s friend Alex (Zissis), a struggling, over-the-hill actor. The health food obsessive Brett is successful in business, and on the surface, his peculiar brand of enthusiasm has gotten him a picture-perfect life: a sweet wife, a solid job, two healthy kids. But under that surface, Brett has some problems in both his personal and professional lives. With Duplass’ casting both male leads of the show are creative auspices on the project as Zissis has been helping with the story. On the film side, Mark Duplass, repped by ICM Partners, recently signed on to star opposite Melissa McCarthy in her starring vehicle Tammy for New Line. He recently wrapped Open Road’s JFK drama Parkland and the Universal-Blumhouse horror Mercy, based on a Stephen King short story. He also stars in, produced, and co-wrote the upcoming Peachfuzz for Blumhouse and is starring in and exec producing the indie The One I Love