UK actress Sienna Miller admits she's disappointed by Bob Dylan's response to her forthcoming movie, Factory Girl. Dylan's lawyers issued producers of the film – a biopic of muse/fashion icon Edie Sedgwick due out this week in the US – with a lawsuit, demanding the legendary songwriter be allowed the chance to view footage before the movie hits screens. Dylan claims Factory Girl defames him by suggesting – via the invention of a fictitious, Dylan-esque character named Billy Quinn – it was his break-up with the Warhol muse that drove her to suicide. "I'm Bob Dylan's biggest fan," Miller told UK newspaper The Observer this week. "I'm mortified that he's p***ed off. She [Sedgwick] needed help and no one helped her. It's not that Dylan drove her to heroin addiction. "[The character of Billy Quinn] very obviously looks and sounds like Dylan," Miller agreed. "But I think a lot of actors base performances on real life."