Kate Middleton isn’t just a duchess: she’s also a style icon in the making. Since she married Prince William back in 2011, she has been a fashion lover’s dream thanks to her attainable, effortless style. Now, that's not to say she can’t dress up from time to time. And when she steps things up, the Duchess does not mess around. For her most recent public outing, for example, Kate Middleton donned a diamond tiara that set the sartorial world ablaze. And while achieving princess status isn't exactly practical, wearing a tiara-inspired headpiece is even if you’re not having dinner with Queen Elizabeth.