We would hardly blame you for thinking this is Sienna Miller you see before you. But it is, in fact, another English Rose gone blonde.
Our 2011 hair colour mantra of just change it is proving ever popular, with just one general rule: it must be a block colour. Kate Beckinsale changes it to blonde, and we think the results are more than satisfactory.
Image source: Just Jared.
Read more about choosing a hair colour at that link.