Winona Ryder joins Natalie Portman in movie Black Swan. Winona Ryder has joined the cast of Natalie Portman’s new movie Black Swan. Directed by Darren Aronofsky, the film centres on a rivalry between two ballerinas at a prestigious New York company. Ryder will play Beth, a dancer who is coming to the end of her career. Vincent Cassel and Barbara Hershey have also boarded the project, which reportedly features a lesbian sex scene between Portman and Forgetting Sarah Marshall star Mila Kunis.