"BLACK SWAN" - MILA KUNIS
LOS ANGELES (AP) -- Unlike her co-star, Natalie Portman, Mila Kunis didn't have any dance background before she started training to be a ballet dancer for "Black Swan." She couldn't believe how difficult it was. Kunis trained for three months. She says it was the hardest thing she's ever done. It was so hard, she says, by the end, it was the closest she'd ever come to "a complete mental breakdown."