Stepping out for an evening devoted to fashion, January Jones showed up at the 2013 Costume Institute Gala at the Metropolitan Museum of Art on Monday (May 6).

Keeping with the PUNK theme, the “Mad Men” actress donned a figure-hugging black leather Chanel frock as she posed for photographers on the chilly Big Apple night.

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.