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Dressed in this unconventional but undeniably stunning Elie Saab Couture jumpsuit, Rose Byrne was the best dressed girl on the red carpet. Click through to shop the look.

Michelle Williams always picks the most beautifully simple looks, and this ravishing red Valentino was no exception. Click through to shop the look.

You'd think bright kelly green would be a difficult shade to wear, but in this one-shouldered Oscar de la Renta, Emily Blunt makes it look like second nature. Click through to shop the look.

With its tea-length hemline, intricate bodice and sublime fit—not to mention that amazing gold knuckle-ring clutch—Emma Stone's Alexander McQueen ensemble makes "basic black" look anything but. Click through to shop the look.

Nominee Jessica Chastain wisely played up her best assets—that gorgeous red hair and porcelain complexion—in this cobalt-colored Calvin Klein Collection gown. Click through to shop the look.

In sequined, floral-print L'Wren Scott, The Descendants' Shailene Woodley playfully reflected her nominated film's Hawaiian setting in her outfit choice.

You can always count on Zoe Saldana to push the sartorial envelope and this lovely, fresh-off-the-runway Givenchy Haute Couture gown didn't disappoint. We especially love the sparkling—yet still conservative—neckline.