Sienna Miller Bikini Malfunction Ass Crack Slip

Looks like someone's having a little trouble with their bikini bottoms. Thanks to some extra water in her bikini bottoms, we got a great look at Sienna Miller's ass. Sienna is a bit of a slut from what I hear but she look great in a bikini so I would totally do her. Hate the chances of getting a STD though, click on pictures to enlarge.

Sienna Rose Miller (born December 28, 1981) is an American-born English actress and model.

Prior to her professional acting career, Miller worked as a photographic model. She signed with Tandy Anderson, and modeled for Coca-Cola, Italian Vogue, Prada and the 2003 Pirelli Calendar.

Miller signed a two-year contract with Pepe Jeans London; the jeans ad campaign first appeared in magazines March 2006.

Miller posed for Vanity Fair magazine's 2006 "Hollywood Issue" topless and smoking a cigarette.

She appeared on the December 2004 and the February 2006 cover of British Vogue, and will appear on the September 2007 cover of U.S. Vogue.