Art, fashion and stars — what could be chicer than that? On Wednesday night, Calvin Klein celebrated the grand reopening of the New Museum in New York City with a star-studded event co-hosted by Julianne Moore, Maggie Gyllenhaal and designer Francisco Costa. Guests like Ashley Olsen and Ali Larter took in the stunning new building by SANAA and risque burlesque performances on the bottom floor. And the designer to wear was definitely Calvin Klein. Thandie Newton told PEOPLE that having flown from London just for the event she decided on her dress by having “just picked it off the rail and chucked it on.” Piper Perabo confessed to a bit more fashion anxiety, telling PEOPLE of her Calvin Klein dress, “[this] is size 2, sample size. But I ran a lot of stairs in the morning because I was nervous about getting into this dress!” Click here to read more about the New Museum.