Keira Knightley, Atonement
Keira Knightley's gorgeous emerald dress in "Atonement" had a few different backups due to the frequent ripping from that famous library scene. "I probably broke them all," Knightley recalled in an interview. "You can't have a sex scene in a dress like that! It was all laser-cut in the front, so literally, if you touched it [it ripped]. They had so many [backups], and the tops had to keep being resewn and redone."
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