Sienna Miller became so emotionally involved playing tragic Andy Warhol muse Edie Sedgwick, her worried mother insisted she take time off to sort herself out. The British actress admits she found it difficult letting go of her character once filming on FACTORY GIRL had finished - until her mum stepped in. Miller says, "She said, 'You've got to stop this now.' "I took myself 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 still think there's still a bit of her in me."