Keira keeps her cool for Pirates premiere Keira Knightley stuns in a backless gown as she and joins glam Hannah Waddingham on set of Netflix's The Woman in Cabin 10 at Spencer Mathews' family estate in Scotland Daily Anyone else still thinking about Keira Knightley's backless green dress from Atonement, 13 years later? At the link in bio, our style editor examines why the backless trend became an unlikely The story behind Keira Knightley's emerald green slip dress from 'Atonement' Vogue Australia 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