Mary-Kate Olsen is being named the worst dressed actress to appear at the Metropolitan Museum of Art Costume Institute Gala in New York on Monday, May 5th.

Apparently Mary-Kate didn’t get the memo that the fashion Gala was not an actual costume party. Many other A-list celebrities dressed to perfection attended the event.

The Gala was held in honor of the museums new exhibit Superheroes: Fashion and Fantasy. The exhibit will be at the Metropolitan Museum of Costume Art Institute from May 7th to September 1st.

Take a look at the photos of the other fashionable celebrities below.

So what do you think does Mary-Kate need to fire her stylist? I think that she is by far one of the worst dressed celebrities in Hollywood.

The 21 year old twin actresses and millionaires have now decided to write a coffee table book about fashion called “Influence.” The book is to be published in Fall 2008 under Penguin’s Young Readers Group, Razorbill.

The book will feature exclusive photos of the twins taken by renown photographer Rankin, have interviews, and more.

“Influence” will feature shoe extraordinaire Christian Louboutin, actress Lauren Hutton, magazine journalist Bob Colacello and more of “the most interesting, challenging, creative people we know,” Ashley Olsen said, sharing what influences and inspires Mary-Kate and her to pursue their fashion passion.

I think that it is about time that the girls write a coffee table book. I mean most of the time they are photographed it is with a Starbucks coffee in their hands. The twins are such coffee junkies that the only thing that Mary-Kate and Ashley request at a photoshoot besides food is that the location have a Starbucks near by.