Fox Searchlight has agreed to co-finance and distribute Black Swan, a supernatural thriller from director Darren Aronofsky (The Wrestler), according to The Hollywood Reporter. The film — about a dancer at the New York City Ballet (Natalie Portman) who doesn’t know if a rival dancer (Mila Kunis) is actually a figment of her imagination — also added Winona Ryder, Barbara Hershey, and Vincent Cassell to the cast, which was first reported by SlashFilm. Shooting is set to start at the end of the year.