While watching the royal wedding coverage this morning, I spotted three guests in the crowd wearing the same dress. The Festival dress from The Vampire's Wife has become a celebrity favorite thanks to its universally flattering shape. The round neck, nipped-in waist, midi-length skirt, and elbow-length sleeves adorned with frilly cuffs are more versatile than you might think. At the royal wedding, there were three iterations of the Festival, which looked totally different, confirming this is a dress that will work within any wardrobe. Keep scrolling to see The Vampire's Wife dress that was a hit at the royal wedding.