Keira went casual in an adorable green Topshop dress while strolling through London yesterday. A few months back Keira claimed that she may quit acting entirely but if that's the case, it won't happen anytime soon. In addition to the upcoming The Best Time of Our Lives, Keira has just signed on to do another project called The Duchess. In the film, Keira will play Georgiana, the Duchess of Devonshire, who has been compared to Princess Diana. Looks like Keira will have to play dress up in fancy gowns and tight corsets like she did in Pirates of the Caribbean.