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WHAT SHE WORE The actress filmed an appearance on The Late Show with David Letterman in a bright knee-length Karen Caldwell sheath, diamond Harry Winston earrings and orange Barbara Bui slingbacks.

WHY WE LOVE IT Jessica Chastain went green in more ways than one by selecting an eco-conscious dress.
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Jessica Chastain

Jessica Chastain in Karen Caldwell

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