Mario Testino is a fashion photographer who has come to define fashion as much as he documents it. Sometimes described as “luxury realism,” Testino’s style is intended to capture his subjects in moments of engagement or expression, as opposed to the vacant, glassy-eyed aesthetic of many of his contemporaries. “I photograph what I see—and what I want to see,” he says. Testino’s images are filled with life and personality—perhaps his most famous shoot was of radiant, vivacious Princess Diana, just months before her death in 1997.