There’s no denying Jessica Chastain has been looking pretty fabulous of late, but last night she took it to a whole new level, stepping out in not one but two killer frocks! Making her way to the Late Show with David Letterman, the actress looked stunning in a cobalt blue, Antonio Berardi, deep-plunge number that offset her red hair beautifully. Then it was a quick change and dash across town for the premiere of her new film Mama, where the actress slipped into a vampy, lace, prom-style dress with sparkling diamanté collar necklace. She even managed to fit in a blow-dry and a quick mani-pedi to match her new outfit. Talk about style dedication!