Keira Knightley Same Style Green Vintage Evening Dress in Movie Atonement, Green S 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 The green dress Kiera Knightley wore in Atonement is my Roman Empire., My life and the lives of countless millennial girls changed when I watched Atonement and saw THE Green Dress for the first time. Atonement dress, Keira Knightley, Green Dress UK Velvet Birdcage The green dress which Keira Knightley wore in Atonement (2007) has been named the best of all time by InStyle Magazine. Exceeding some classics as Audrey Hepburn's little black dress in Breakfast English actress Keira Knightley was born #OnThisDay in 1985. She wore this now iconic emerald green silk satin backless evening dress, designed by Oscar winning costume designer Jacqueline Durran, as Cecilia Tallis in Atonement (