The model is Lottie Moss. (source)
The cover is shot by Rachell Smith with styling by Svetlana Vashenyak. (source)
Lottie Moss and Lucky Blue Smith are wearing Saint Laurent Paris by Hedi Slimane on the May cover of Vogue Paris shot by Mario Testino, styled by Emmanuelle Alt. Hair and make up by Stéphane Marais and Eugene Souleiman. (source)
Click here to view last year cover featuring Liya Kebede, here to view 2014 cover featuring Sophie Marceau, here to view 2013 cover featuring Freja Beha Erichsen, here to view 2012 cover featuring Laetitia Casta, here for 2011 cover with Kate Moss, and click the links for 2010’s three different covers featuring Penelope Cruz/Meryl Streep, Penelope Cruz/Bono and Penelope Cruz/Kate Winslet/Julianne Moore/Meryl Streep/Gwyneth Paltrow/Naomi Watts.