Natalie Portman in Black Swan
Natalie Portman’s dedication took a toll on her health, and after the movie came out, she admitted there was a point during the rehearsals for the part of the ballerina where she was afraid for her life.
Much like Margot Robbie for the role of the ice skater, for her ballerina role Portman had to spend eight hours a day rehearsing her dancing and lose twenty pounds. This was taking it a bit too far for the fragile actress, and she dislocated a rib during rehearsals.