British model/actress Sienna Miller is being forced to reshoot scenes for her forthcoming movie FACTORY GIRL. The Alfie star filmed the biopic of tragic Andy Warhol muse Edie Sedgwick in New York City in January (06), but producers have asked her to come back to redo more scenes. Miller has to re-film the sequences where her character screen-tests for Warhol, but this time the artist's pals BRIGID BERLIN, Sam Green, RICHARD and ROBERT DUPONT will appear in the background to add credibility to the movie, according to gossip site PageSix.com.