They’re no strangers to fashion festivities, and last night (March 16) Mary Kate Olsen and Ashley Olsen were in the house for the 2011 CFDA Fashion Awards announcement party.

The “Full House” ladies arrived at Diane von Furstenberg’s New York City studio to mingle with style industry bigwigs and hear who was nominated for a trophy at the upcoming June event.

Credit: Celebrity Gossip

Olivia Palermo attends the 2010 Institute for Civic Leadership spring benefit at the Diane von Furstenberg Studio on June 15, 2010 in New York City.

Credit: Zimbio