Deadline is reporting that Annet Mahendru and Peter Vack have signed up to star in indie horror film Grow.

The film focuses on a man who is imprisoned and impregnated by a group of cult members with an archaic belief system.

Annet Mahendru (whose credits include The Walking Dead: World Beyond and The Americans) will be playing the role of twins Kitty and Locasta Larkin, and Peter Vack (The Bold Type and Homeland) will be playing the role of the imprisoned, impregnated man.

The project is being written and directed by Brian Gottlieb, who will also produce alongside Bryson Pintard and Michael Tipps, with Louie Gibson serving as executive producer.