20 Fashion icons that have left their mark in cinema keira knightley wearing rodarte at the premiere of atonement, 2007. Keira Knightley Editorial Stock Photo Stock Image Shutterstock Editorial Keira Knightley's green dress from Atonement we still talk about you Netflix Facebook Keira Knightley wears two different dresses in one at London Film Festival, we likey OK! Magazine 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