In addition to grueling pain Kunis put her body through, she also said that immersing herself into the world of ballet dancers helped her learn how everyone “walks, talks and handles themselves”.
She trained for four or five hours a day, seven days a week for three months before they started shooting. Kunis also said that there was nothing sensual about her training, although ballet is often perceived as such, and she also called it “one of the most excruciating sports ever”.