Mary-Kate attended a cocktail party in honor of the 2009 Tribeca Film Festival on March 23. Check out photos from the evening below:

Some events from last month:

First, Mary-Kate Olsen and Nate Lowman attend the after party for Wool and The Gang’s U.S. debut and unveiling of The Smile Dinner Celebration hosted by Julie Gilhart at The Bowery Hotel on February 19, 2009 in New York City. Next, the Saks Fifth Avenue Launches New Contemporary Space on February 5th. Then, the Belvedere IX Launch Party on the 12th, and finally, the Vladimir Restoin-Roitfeld Presents David Mushegain event on the 17th.