Obviously, the prime inspiration for the ART’s new productions, Darren Aronofsky’s BLACK SWAN features Natalie Portman as Nina, a ballerina rehearsing to play the lead in Tchaikovsky’s Swan Lake. pushed to her limits by a demanding artistic director (Cassel), an overprotective mother (Hershey), and an uninhibited new member of the company (Kunis), Nina’s reality begins to fracture under the pressure to perform. Brattle Debut!