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Rebecca Hall learned a lot about glamour in preparing for her role as Sylvia Tietjens. “It was imperative that we went for flowing red hair and tight-fitting outfits and a different outfit in every possible scene. She has such confidence that she will be the most looked at and the most glamorous person in the room without lifting a finger. She doesn't need to put any effort into anything she does, and that was the first base in characterization – to just slow down my inner clock, make the voice lower, stronger, posher. You don't need to rush anything.”