03/03/2014 10:50 EST | Updated 03/03/2014 11:59 EST

Reese Witherspoon's Vanity Fair Oscar Party Dress Is Eye-Popping (PHOTOS)

Anthony Harvey via Getty Images
WEST HOLLYWOOD, CA - MARCH 02: Reese Witherspoon attends the 2014 Vanity Fair Oscar Party hosted by Graydon Carter on March 2, 2014 in West Hollywood, California. (Photo by Anthony Harvey/Getty Images)

We haven't seen this side of Reese Witherspoon since "Cruel Intentions"!

The mom-of-three attended the 2014 Vanity Fair Oscar party on Sunday in a plunging gown that took us all by surprise.

The Jason Wu for Hugo Boss frock revealed plenty of cleavage (and a fair share of sideboob) which is a major style 180 for the actress who usually favours more classic and modest dresses. (Not that we're complaining!)

Although she skipped the 2014 Oscars red carpet, the blond beauty (who was rocking a chic bob) attended the after-party to support husband Jim Toth, a Hollywood agent who represents Matthew McConaughey and Jared Leto, both of whom won Best Actor and Best Supporting Actor Oscars, respectfully.

Reese also posed for the Vanity Fair Oscars portrait studio, where she looked contemplative, as if she were thinking, "When will I win my next Oscar?"

What do you think of Reese's sexy dress?

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