Miller admits to using "chicken fillets"

Sienna Miller has admitted that she wore fake boobs in her new action movie G.I. Joe.

The actress was told by director Stephen Sommers that her natural figure was not adequate for the role of The Baroness.

"The director said 'I'm gonna be honest, I like girls with big boobs', and I don't have them so we made them bigger," she told Hollyscoop.

"At least he's honest. But I was mildly offended."

Miller described the breast enhancements as "things that looked like chicken fillets".