Michelle Williams & Jessica Biel: Tiffany Blue Book Gala!

Michelle Williams and Jessica Biel attend the Tiffany & Co. Blue Book Ball on Thursday (April 18) at Rockefeller Center in New York City.

The ladies stepped into the giant Tiffany’s box that evening to check out the new Jazz Age, Art Deco-inspired Blue Book jewelry collection.

PHOTOS: Check out the latest pics of Michelle Williams

FYI: Michelle is wearing a Katie Ermilio dress, Tiffany & Co. earrings, bracelet and clutch, and Brian Atwood shoes. Jessica is wearing an Elie Saab dress and Tiffany & Co. jewelry.

20+ pictures inside of Michelle Williams and Jessica Biel at the Tiffany Blue Book Gala…