Rooney Mara Is Wearing Valentino at the 2016 SAG Awards

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Rooney Mara

The 'Carol' actress turned heads in a plunging dress.

Ruffle-loving Rooney Mara stepped out for the SAGs red carpet in a black Valentino, which she styled with a cool high ponytail, as she arrived Saturday evening at the Shrine Exposition Center in Los Angeles.

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The Carol actress is nominated for outstanding performance in a supporting role, putting her up against fellow nominees Rachel McAdams (Spotlight), Helen Mirren (Trumbo), Alicia Vikander (The Danish Girl) and Kate Winslet (Steve Jobs). Her co-star, Cate Blanchett, also scored a SAG nomination for outstanding performance in a leading role.

The 22nd Annual SAG Awards will be simulcast on TNT and TBS at 8 p.m. ET/5 p.m. PT.