Sienna Miller is a lady what acts, a lady what models, a lady what plays the fashion game - and you know what? She even dabbles politics. Is there NOTHING she can't do?
Yes, the do-good gal proved that when it comes to rallying up awareness and medical support across the globe for countries during war and natural disasters - she's on the case. She's backing the "First Responders" all the way.
Looking the business Sienna wore a crisp white shirt, a lightweight blazer, skinny black jeans and ankle boots. The oversized navy Autumn coat thrown over her arm - this is EXACTLY how to do smart-casual. The lady done good.
Take a look through this gallery to see more of Sienna's head-turning style...