Surprise! Vogue’s second annual special edition best dressed issue just hit newsstands and in addition to trend reports and a list of new style stars, Vogue has dubbed this year the “Year of the Sister.” The glossy is covered, appropriately, by everyone’s favorite stylish twin moguls Mary Kate and Ashley Olsen, neither of whom have ever done a Vogue cover (weird, right?).

Of course, they’re not the only fashionable sisters deserving of attention. Inside, they also feature Dakota and Elle Fanning, Kate and Pippa Middleton, Beyoncé and Solange Knowles, Charlotte Gainsbourg and Lou Doillon, Bianca and Coco Brandolini, Poppy and Cara Delevigne, Lily and Ruby Alridge, Claire and Virginie Clarins, and Rooney and Kate Mara.

Click through for a few photos we scanned from inside the issue, plus a look back at some more of our favorite stylish sisters, from Anne and Mary Boleyn to Tia and Tamara Mowry.