Natalie Portman also had to make a great physical effort when she got the role of a ballerina in Black Swan (2010). Before filming, she spent a whole year training for eight hours a day, six days a week in crder to leam to dance. Once filming began, things didn't get easier either. Portman dislocated a rib while dancing. Nevertheless, she bravely continued filming during the six weeks it took her to recover.