Dabbling in narrative filmmaking in-between his many documentaries, it was recently announced Werner Herzog was in production on his first animated feature, The Twilight World, based on his 2021 novel of the same name. Now we have another narrative project to add to his slate, one that comes with quite the intrigue in both cast and synopsis.

For the first time ever, Rooney and Kate Mara will star in a film together, Deadline reports. They’ll lead Herzog’s Bucking Fastard, which he is writing and directing. The film is based on the true story of inseparable twin sisters Joan and Jean, drawing from the lives of Freda and Greta Chaplin, who became sexually infatuated with their next-door neighbor and eventually received a restraining order. The title of the film, which begins production this spring in Ireland and Slovenia, is based on a simultaneous verbal slip the twins made in court.