Keira Knightley editorial photo. Image of london, film 22228271 Deep V Neck Thigh High Split Maxi Halter Sleeveless Backless Bodycon C The Clothing Company Sydney 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 Ribbed Halter Neck Backless Bodycon Dress Wholesale Capella Apparel