As many times as I've seen Sienna Miller with dark hair, she still seems so unrecognizable without her blonde locks. It's been surprising that the little fashionista/fashion designer is missing out on all of NY Fashion Week, but here she is hard at work on the set of Hippie Hippie Shake in London. I'm betting she'll find the time to see some shows at the upcoming Milan and Paris Fashion Weeks - maybe even with her design partner sister by her side. A girl, especially not Sienna, can't resist the runway for too long!

More of Sienna on set so read more