Applegate is a fan favorite outside The Late Show with David Letterman studio in New York City. Plus: Harrison & Calista, Nicole & Joel, Mary-Kate Olsen and more

FILM BUFF

Mary-Kate Olsen stands up for the arts, arriving at a cocktail reception celebrating the 2009 Tribeca Film Festival program on Monday at the W Hotel in Hollywood. The New York City film fest kicks off on April 22.