Oscar Buzz for Sienna Miller in Andy Warhol film

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Although Sienna Miller has yet to finish post-production work on her upcoming flick Factory Girl we hear that this British beauty may already be stirring up some Oscar buzz.

In “Factory Girl” Sienna takes on the role of Edie Sedgwick, the tragic style icon who was artist Andy Warhol’s muse. The small-budget independent picture could become an important boost to Sienna's acting career. Those who have seen early rough-cut versions say the performances of Sienna and leading man Guy Pearce, as Warhol, are brilliant. Critics are saying that people shouldn’t be surprised if Sienna and Pearce both receive Oscar nods for this Weinstein production.

About playing Edie Sedgwick Sienna has said: "The more I delved into her, the more I realized she'd had this traumatic life." Edie’s childhood was an emotional nightmare, she was popping Valium at eight, had electric shock treatment at 14, and was sexually abused by her father. You can see why she went so wild," Sienna noted, alluding to Sedgwick's society antics in Sixties New York.

The actress, 24, was fascinated by Sedgwick, spending the best part of a year researching her life, and admits she became "totally obsessed" with the model-turned-muse.

"I found it really hard to take my black tights off," she joked, referring to Sedgwick's trademark nylons But then, more seriously, she added: "Actually, I didn't want to let her go."

Finally, though, Sienna's mother told her to pull herself together. "She said: 'You've got to stop this now.' I took off to Mexico on my own for a week and just chilled out, but it was several more weeks before Edie escaped my system. I think there's still a bit of her in me."

We can’t wait until this movie comes out. In the meantime Sienna is a busy girl, other movies she's shot this year, in addition to Factory Girl and The Mysteries Of Pittsburgh, include Interview, Camille and Matthew Vaughn's Stardust.