Exclusive Video: Natalie Portman Explores Her Dark Side in 'Black Swan' Clip

Black Swan is a psychological thriller that stars Natalie Portman and Mila Kunis as ballerinas in a production of Swan Lake. The production calls for one dancer to play both the innocent White Swan and the dark Black Swan, and when Portman and Kunis find themselves competing for the part, that competition leads to a twisted romantic relationship between the two that finds Portman's character both seduced and threatened by Kunis and her own darker side.

In this exclusive clip from the film, we see that exploration taking place in a wild nightclub, as the two get close amid flashing lights and blaring music.

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