Jessica Chastain's Oscars Look: 7 Days Of Beauty At The Oscars (#7)

Jessica Chastain made a major fashion splash on the red carpet at the 2013 Oscars. Now, a look back as we break down her gorgeous look!

The “Zero Dark Thirty” star, who was up for the Best Actress award, turned up at the Academy Awards in a gorgeous custom Armani gown.

The metallic-toned dress is actually in a copper-hue, according to the design house, and features a mermaid silhouette, highlighted by a fitted bodice and abbreviated train.

PHOTO: See Jessica Chastain’s Full Length Oscar Look!

The dress has a geometric, lattice-patterned mesh overlay of shimmering white sequins and Swarovski crystals.

For jewels, Jessica turned to Harry Winston, wearing vintage diamond earrings and vintage diamond and gold bracelet.

WATCH: Jessica Chastain Hits The 2013 Oscars Red Carpet

For more best dressed stars from the 2013 Oscars, check out these photos!

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