Keira Knightley Source on Instagram: I've always found these dresses quite similar, but the green dress from 'Atonement' will forever be my favorite. Which one do you Atonement: Keira Knightley's Green Dress Clothes on film She walked into the room, and time held its breath. Keira Knightley's emerald silk in Atonement (2007) wasn't just a costumeit was cinematic seduction. Named the best movie dress of all Keira Knightley Green Vintage Evening Dress in Movie Atonement Celebrity Dress TheCelebrityDresses