Supermodels Alessandra Ambrosio, Helena Christensen, Miranda Kerr, Alek Wek, Karolina Kurkova and Isabeli Fontana pose for Pirelli‘s 50th Anniversary 2014 Calendar. Ever since Pirelli published its first calendar in 1964, its pages have been graced by the presence of legendary models and actresses shot by equally legendary fashion photographers. This year, Peter Lindbergh and Patrick Demarchelier pre-release some shots of the calendar which will be released later this year. They are not sold in retail, but are distributed in “complete secrecy” throughout the industry. Browse through the gallery for the pre-released shots, their behind-the-scenes as well as some iconic images from Pirelli’s past.