We love Sienna Miller's gorgeously flattering and versatile denim midi dress that's sure to become an autumn staple this season - her vampy styling with a leather trench coat and matching lace up boots was a stroke of genius.
Sienna Miller is a huge fan of denim and regularly steps out in impossibly cool denim styles, like barrel leg jeans and ultra-baggy styles, to give us the best casual-chic outfit inspiration out there.
