Ashley Olsen wore a bright and cheery Dior Couture gown from 1972 for this evening's Costume Institute Benefit red carpet in NYC. Ashley arrived with her sister Mary-Kate, who also went vintage but in Chanel, for the night. Ashley and Mary-Kate are no strangers to the Costume Institute and Vogue's annual event at the Metropolitan Museum of Art, but they once again opted to go on their own rather than teaming up with another designer or donning pieces from their own collection. What do you think of Ashley's look? Weigh in on all of our fashion and beauty Met Gala polls now!