Mila Kunis: Natalie Portman 'Danced Her A** Off'

03/28/2011 10:10 pm ET | Updated May 28, 2011

Black Swan co-star Mila Kunis is speaking out in support of her friend and cast mate Natalie Portman amid accusations that the bulk of the dancing in Portman's Oscar-winning role was actually performed by her dancing double, American Ballet Theatre soloist Sarah Lane.