It's their first Vogue cover ever, marking that they are Vogue's annual Best Dressed of 2011. Mary Kate and Ashley Olsen are the world's most stylish siblings. This year it's "Dynamic Duos" theme and the 25-year- old twins nabbed top honours, beating out other stylish sisters such asDakota and Elle Fanning, Beyonce and Solange Knowles and Kate and Pippa Middleton.
Congrats Mary Kate and Ashley - we love your style:)
