The Story Behind Keira Knightley's Emerald Green Slip Dress From 'Atonement' Vogue Keira Knightley's dress on (Hollywood) show at V&A London Evening Standard The Standard A dress so iconic the original went missing! , Keira Knightleys emerald silk gown in Atonement wasnt just the green dress it was the moment. Custom dyed, cut on the bias, and so delicate it tore Keira Knightley's unforgettable green dress in Atonement was custom designed by costume designer Jacqueline Durran, created specifically for the film rather than by a fashion house. Inspired by 1930s bias cut evening gowns, the