It's only Tuesday, but Jessica Chastain's already supplied enough glamorous fashion fodder for the whole week. Her appearances on the Late Show With David Letterman and at the New York Film Critics Circle Awards last night drew out two lovely looks from the actress (who already wowed us with her enviable Winter coat collection). Now, it's clear the actress is revving up for award-season fashion — and we have a feeling that these two test runs are just the tip of the iceberg for the Zero Dark Thirty star. For her first trick, Jessica headed to the Late Show in a brilliant, cobalt-hued Antonio Berardi sheath. The curve-skimming sheath fits perfectly, and while the front of the dress is classically chic, the real wow factor is the exposed-zip and cutout back. For the finish, Jessica looked to a pair of ankle-strap heels, the perfect choice to play up the dress's sexier side.Of course, that's just the beginning of Chastain's night — the style antics continued when the actress headed to the New York Film Critics Circle Awards, this time in a lacy Oscar de la Renta fit-and-flare confection from the label's Pre-Fall '13 collection. Switching gears, Jessica played to a more ladylike side with a feminine cut, frilly details, and a megawatt Queen by Harry Winston diamond collar necklace (totaling $1.3 million). She arrived in a classic black coat, and finished it off with a pair of peep-toe Louboutins for a sweet take on evening style. Now, it's time to cast your votes — which of Jessica's little dresses wowed you?