Ready to celebrate the best in fashion, Olivia Wilde attended the 2013 Costume Institute Gala in New York City on Monday evening (May 6).

Accompanied by her handsome fiancé Jason Sudeikis, the “Cowboys & Aliens” actress showed off her assets in an ivory bandeau gown from the Calvin Klein Collection.

Every year, the Costume Institute of The Metropolitan Museum of Art puts together a killer collection of amazing goodies complete with a star-studded party to kick things off.

And this time around the theme is “PUNK: Chaos to Couture,” an examination of punk’s impact on high fashion from the 1970s up to the collections found on today’s runways the world over.