Patrick Demarchelier is one of the world's most coveted fashion photographers. He has created iconic portraits and photographed covers and campaigns for many influential publications and fashion houses. In 2003, he said: "I have no formal qualifications, just the school of life. I learned most by just taking pictures; a lot of pictures. I've made plenty of mistakes, but it's often from your mistakes that you learn most. Being a photographer is like being an athlete. You must practice every day."