Sarah Lane, a soloist with the American Ballet Theatre who worked as Portman's dance double, claims the 29-year-old star only did about five percent of the full body shots seen in the movie.
Lane has also alleged that producers pressured her to downplay her involvement.
But now Fox Searchlight and filmmakers have released a joint statement, which reads: 'We were fortunate to have Sarah there to cover the more complicated dance sequences and we have nothing but praise for the hard work she did. However, Natalie herself did most of the dancing featured in the final film.'
The No Strings Attached star, who has yet to comment on the issue, won an Oscar for her performance in the film.