Mary-Kate Olsen is devastated that most of her performance in upcoming film "Factory Girl" has ended up on the cutting room floor.

The 20-year-old featured in the movie, which focuses on artist Andy Warhol's muse Edie Sedgwick, played by British star Sienna Miller.

A source tells American publication "Us Weekly" Olsen was "reduced to being an extra. She had two scenes with lines, but they cut them to focus on the movie's Oscar hopeful Sienna Miller."

Olsen's representative denies claims she is upset about her part being slashed saying, "It was a creative decision."