Jessica Chastain now has a co-star for her upcoming horror film Mama. Nikolaj Coster-Waldau, who is positively menacing as Jaime Lannister on HBO’s Game of Thrones, is now set to topline the Guillermo del Toro-produced horror film alongside Chastain, per Heat Vision's report. The film tells the story of a couple who take in their niece and nephew after the children were found living in the forest for five years. As horror stories tend to go, murderous events unfold and it’s clear that some supernatural force is bent on tormenting the kids. Andres Muschietti is directing the film, expanding the story he created with his short film of the same name.

Chastain is quickly becoming Hollywood’s “It Girl,” and I am wholeheartedly onboard. So far this year she’s starred in Terrence Malick’s The Tree of Life, the Sundance drama Take Shelter, box-office king The Help, and the thriller The Debt. But that’s not all, as she’s still got the all-star adaptation of The Wettest County in the World and Al Pacino’s opus Wild Salome to come. Coster-Waldau turned heads as one of the devious villains on HBO’s smash-hit series, and is sure to have people yelling at their TV screens once again when the show returns for its second season next year.