Gregorio T. Binuya/Everett Collection

WHAT SHE WORE Jessica Chastain paired a pastel Christian Dior cocktail dress with Harry Winston diamonds and leather Louboutins for an N.Y.C. screening of The Debt.

WHY WE LOVE IT This fashion chameleon does sweet just as well as sultry. A soft updo and nude stilettos complemented the actress's airy confection.
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Jessica Chastain

Jessica Chastain in Christian Dior