Sienna Miller is popping pills to enhance her bust.The 24 year-old blonde - who has recently finished filming 'The Factory Girl' in New York - was left devastated after she dropped down to 7st 5lbs for the role, and her bust size dropped down to a 32B.Sienna is now popping£200-a-pack boob-enhancing herbal capsules, which contain fenugreek, yam root, kelp and fennel seed, that promise to increase boobs by a cup size.According to Britain's Grazia magazine, Sienna, who has reportedly dumped Hayden Christensen to rekindle her romance with Jude Law - told friends: "I don't even need a bra now. It'd be wonderful to have some womanly curves again, I dream about it."

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