Sienna Miller has put down the flower crown. From her days of slouchy denim and loose flowing tops and dresses, Sienna has moved on to tailored separates, structured bags, and dark sunglasses. In short, she's having what we'd call a "Siennasance," an outbreak of street style looks so good, we can't help but take a tip from them all.
Read on to see how the birthday girl, who turns 35 today, has taken her outfits from rugged bohemian to polished and elevated and even started a few trends along the way. We'd argue that these crisp, casual ensembles give her most elegant red carpet gowns a run for their money — just try to tell us you don't agree.