Credit: Gregg DeGuire/WireImage

Captain Fantastic, an upcoming comedy drama starring Viggo Mortensen, got some new cast members on Monday: Steve Zahn (Dallas Buyers Club), Kathryn Hahn (Bad Words), Missi Pyle (Gone Girl), and Erin Moriarty (True Detective) are all set to co-star in the film, which Entertainment One acquired the international rights to on Monday.

Captain Fantastic follows a father (Mortensen) trying to teach his six kids the ways of the wilderness by immersing them into the forests of the Pacific Northwest. He himself struggles to adjust, however, when he's forced out of the wilderness and into the real world. Frank Langella also co-stars.

"This is a project we all fell in love with and was voted best script of 2014 by our distribution teams on the ground," president of Entertainment One Films International Harold van Lier said in a statement. "It is a very original story, both funny and deeply emotional and a wonderful role for Viggo. I don't think we have read anything like it since Little Miss Sunshinebut this is altogether very different."