Sienna Miller was willing to do whatever it took to get her new movie role - even if it meant getting ridiculously thin.
Sienna says she went on a vodka diet to lose weight for her latest film.
The slim 24-year-old actress had to get down to a controversial size 0 for her role as Edie Sedgwick in the new movie "Factory Girl."
Sedgwick was revered artist Andy Warhol's muse and an "It" girl of the mid-60s, who was addicted to drugs and suffered from depression and bulimia. So Sienna, who recently split for good from her off-and-on boyfriend Jude Law, resorted to drastic measures to make sure she accurately resembled her troubled character.
She reportedly said, "I decided to drink vodka instead of wine because it has less calories."
Another slimming technique was to eat omelets made only of egg whites.
Sienna stars opposite Guy Pierce, who plays Warhol, and Hayden Christensen who plays Sedgwick's fictional lover Billy Quinn.
Quinn is believed to be based on three of Sedgwick's real life partners - Bob Dylan, the late Doors singer Jim Morrison and Mick Jagger.
Sedgwick tragically died at the age of 28 from a barbiturate overdose.
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