Sienna Miller will always be thankful for the gift giveaways at the Sundance Film Festival - because they kept her in underwear while she was promoting new movie INTERVIEW. The forgetful Alfie star arrived in Park City, Utah last week (ends26JAN07) without her socks and knickers, but found lingerie firms promoting new stock at the festival were prepared to give her everything she needed to keep the cold at bay. She explains, "I got one pair of cashmere socks and knickers, because I forgot my knickers. That was an absolute emergency!" But the British star didn't appreciate getting bags of freebies thrust at her as she walked from one interview room to another, and has given all of the "swag" she received away to her favourite charities, so they can auction the items off.