Spanish Crown Prince Felipe (R) and his wife Princess Letizia (L) pose with their daughters Infanta Sofia (2nd L) and Infanta Leonor in his official residence in Madrid August 1, 2012 in this picture released by Spanish Royal House. Spanish Princess Letizia celebrates her 40th birthday on September 15.[Photo/Agencies]

Spanish Crown Prince Felipe (2nd L) kisses his daughter Infanta Leonor as Princess Letizia and their daughter Infanta Sofia (R) look on at his official residence in Madrid August 1, 2012 in this picture released by Spanish Royal House. Spanish Princess Letizia celebrates her 40th birthday on September 15.[Photo/Agencies]