The Story Behind Keira Knightley's Emerald Green Slip Dress From 'Atonement' Vogue Threads: Summer garb from "Atonement" Blog The Film Experience When we started making the movie, we all knew it was a pivotal moment and it had to be a memorable dress. To make a dress that bold everyone has to be Atonement Green Dress Iconic Scene 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 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