It’s fun being an actress – you get to change your look all the time, and if anyone slags it off you can just say it’s for a film role. However, we don’t think anyone will be slagging off Sienna’s new hairdo – in our opinion, it really suits her. Sienna’s gone dark and has also been beefing up at the gym for her first big action role as The Baroness in GI Joe. Sienna’s sun-bleached golden locks are as famous as her uber-boho style, but are you glad to see the back of them, even if it’s only temporary?
Who's gone brunette?