British beauty Sienna Miller is thrilled to be playing Andy Warhol's muse Edie Sedgwick, because it will give her a good reason to cut off her long blonde locks.

Miller, who will portray the troubled beauty in upcoming movie FACTORY GIRL, is bored of her lustrous mane, and the coveted role will finally allow her a fresh hairstyle.

She says, "This was the 1960s, so when I do Edie I'll chop off all my hair.

"It'll be great to cut it, and great to play Edie. She was gorgeous, but she destroyed herself."