What happens when the Duchess of Cambridge chooses a $340 dress from a popular British chain store for her first official duty as a newlywed? It sells out that day, of course! Catherine picked the simply elegant “Shola” sheath for her meeting (alongside her new husband Prince William) with the equally stylish Michelle Obama and President Barack Obama. And predictably, when the news spread of her wearing it, Reiss’s website crashed from all the traffic. The retailer has announced that they are re-stocking the sold-out style, but it will be first come, first serve to buy it — no pre-orders are being taken! However, there is a list that will alert you as soon as the style is back in stock in the next five to six weeks, which you can access at reissonline.com.