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01/08/2013 at 06:30 PM ET

Emma Stone LanvinJon Kopaloff/FilmMagic; Courtesy Lanvin

One of the (many) perks to being Emma Stone: You can presumably have a designer dress shipped across the country in mere hours.

Stone wore a cherry-red knee-length Lanvin sheath with a sweetheart neckline and floral brooch for the Gangster Squad premiere in