In Black Swan, emotionally fragile ballerina, Nina Sayers, compellingly played by the translucent Natalie Portman, falls apart as she strives to embody both the White and Black swans in a prestigious production of Swan Lake. This would be the stuff of docu-drama or soap-opera, were it not directed by Darren Aronofsky, a filmmaker not known for his restraint when depicting obsessiveness. Thus there’s plenty of close-up-and-personal camera-work, both on and off stage, and emphasis on the perfectionist self-harm inherent in the profession, as well as much clever use of mirrors and just-glimpsed doppelgangers as Nina loses touch with her identity. Vincent Cassell, as usual, plays the Devil, this time as a sexually provocative choreographer; Mila Kunis is excellent as Nina’s vivacious rival, her complete opposite (she eats, laughs, has sex etc.); Winona Ryder has fun as her suicidal predecessor; and Barbara Hershey is a satisfyingly not-quite-monstrous stage mother, ambitious for her daughter, and wounded from her own failures of the past, but still looking on in horror as Nina stampedes towards self-destruction. The film appears to suggest that the central character’s apparent conviction that Art is more important than Life is mistaken, given her escalating insanity, but the relish with which Aronofsky tells the tale - The Red Shoes with more than a touch of Saw - suggests that he’s ambivalent on the matter. Never less than fascinating.