What’s the secret behind Jessica Chastain’s red-carpet style? Each look is perfectly planned, thanks to her stylist Elizabeth Stewart. “She knows me so well,” Chastain told InStyle.com of her fashion hero, an industry veteran who has also worked with Cate Blanchett, Jennifer Lawrence, Freida Pinto, and Amanda Seyfried. “She knows that I love color. I also like things that have an old-fashion vibe to them. I love celebrating a woman’s body and femininity. So she knows what to pull.” Just take a look at some of her vibrant choices above (from left, Viktor & Rolf, Roland Mouret, Balenciaga, and Karen Caldwell), and see more of Chastain’s recent red carpet fashion show in the gallery.

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— Lindzi Scharf