Black Swan (2011)

This is the 2011 psychological thriller film [Black Swan], starring Natalie Portman. The movie dramatically portrays the gradual descent into madness of Nina (Natalie Portman), a dancer who must perfectly embody the duality of a role with two personas in a stage performance. New York City Ballet ballerina Nina is chosen to star in the new production of 'Swan Lake,' but artistic director Thomas (Vincent Cassel) deems her technically perfect but lacking the freedom and desire of the Black Swan, possessing only the purity of the White Swan. Consequently, Nina suffers from hallucinations and delusions, tormented by conflict with her rival and the pressure to be flawless. Praised as Natalie Portman's career-defining performance, she won the Academy Award for Best Actress for this role.