It’s their first Vogue cover. The cover was snapped by Mario Testino and styled by Anastasia Barbieri. (source)
Click here to view last year cover featuring Kati Nescher, here to view 2013 cover featuring Zhang Ziyi, here to view 2012 cover featuring Monika Jagaciak and Liu Wen, here to view 2011 cover featuring Fan Bing Bing, here for 2010 cover with Sarah Jessica Parker, and here for 2009 cover with Anna Selezneva.