Anyone else still thinking about Keira Knightley's backless green dress from Atonement, 13 years later? At the link in bio, our style editor examines why the backless trend became an unlikely Keira Knightley cuts an elegant figure in a strapless dress while Shanina Shaik flashes her sideboob in a racy ensemble at as they lead the stars at Tod's Milan Fashion Week show Atonement Cecilia Green Long Dress Backless Maxi Dress Keira Knightley Prom Dres eBay Keira Knightley Joins Co Stars Ben Whishaw & Sarah Lancashire at 'Black Doves' Premiere in London: Photo 5103159 Adam Silver, Andrew Koji, Ben Whishaw, Black Doves, Ella Lily Hyland, Isabella Wei, Kathryn Keira Knightley wears two different dresses in one at London Film Festival, we likey OK! Magazine A dress so iconic the original went missing! Keira Knightley's emerald silk gown in Atonement wasn't just the green dress it was the moment. Custom dyed, cut on the bias, and