Mila Kunis will star opposite Natalie Portman in Darren Aronofsky's already announced Black Swan. (Cinematical)
The plot:a veteran ballerina competes against "a rival dancer, with the stakes and twists increasing as the dancers approach a big performance." Oh, and throw a little supernatural flavor for good measure. Well, according to The Hollywood Reporter, the rival will be played by Forgetting Sarah Marshall's Mila Kunis, and that bit of strangeness: this rival "might or might not be a figment of the dancer's imagination."