Eva Mendes - MET Costume Institute Gala 2009

Eva Mendes (in Calvin Klein) sparkles at the “Model as Muse: Embodying Fashion” Costume Institute Gala at The Metropolitan Museum of Art in New York City on Monday (May 4).

The 35-year-old actress was accompanied on the red carpet by designer Francisco Costa, the creative director of Calvin Klein Collection.

At the swank event, WWD spotted Eva smoking in the ladies room with the Olsen twins, Mad Men‘s January Jones, the Proenza Schouler boys (Lazaro Hernandez and Jack McCollough) and Olivier Theyskens (the artistic director of French fashion house Nina Ricci).