Frock stars Irish Independent Pre Sell Keira Knightley as Cecilia Green Dress Atonement LausenCrafts 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 Atonement Dress Etsy Keira Knightleys green dress in Atonement (2008) was designed to embody desire, elegance, and envy. Flowing and sultry, it enhanced the passion of the library scene while its striking shade of Alexa Chung Just Re Created Keira Knightley's Iconic Atonement Dress Who What Wear