blackswandancing.jpgABC/Fox Searchlight

Natalie Portman's body double in Black Swan, Sarah Lane, continues to speak out about the amount of dancing she claims Portman did her her Oscar-winning role in the ballet film.

Lane told 20/20's Elizabeth Vargas she wants the film's producers to come clean about the dancing Portman really did: "They're completely lying about the amount of dancing Natalie did in the movie."

Lane, a trained ballerina, says claims Portman did most of her own performance scenes are an insult to her profession:

    "I've been doing this for 22 years, and to say that someone trained for a year and a half and did what I did is degrading not only to me but to the entire ballet world. They threaten the entire principle of ballet and I feel like I need to say something."

The film's director, Darren Aronofsky, says the claims are completely untrue. The ABC show aired this response from him:

    "Here is the reality. I had my editor count shots. There are 139 dance shots in the film—111 are Natalie Portman untouched. Twenty-eight are her dance double Sarah Lane. If you do the math, that's 80 percent Natalie Portman."

When the film's editor Andy Weisblum was approached, he said, "There are about 35 shots that are full-body shots in the movie. Of those 35 shots, 12 are Natalie, and then the rest are Sarah."

But that's not the only controversy about a Natalie Portman body double ... an Irish student has come forward to say she was paid $450 to stand in for Portman in a scene of Your Highness. Read more about that, after the jump ...