Miller went topless to honour Sedgwick

Sexy Sienna Miller agreed to go topless as artist Andy Warhol's muse Edie Sedgwick in new movie 'Factory Girl' after coming to terms with the socialite's drug-addled depression.

The actress researched her role by talking to Sedgwick's husband and brother and realised she wouldn't be doing the model justice if she kept her clothes on for degrading drug and sex scenes in the film.