
"I have decided to auction an image of Diana to help the people in Peru because, for me, Diana went out of her way to help people," he said Wednesday. Testino has also gained the reputation of being Diana's favourite photographer and has since been enlisted for official portraits of her sons, Princes William and Harry.

Photos from the session - which depict her relaxed and comfortable - have also been exhibited in London, with some currently on display at the U.K.'s National Portrait Gallery. The shoot would eventually prove to be the final portrait session for the princess, who died in a Paris car crash about six months later. The image set to cross the block comes from the photo session Testino conducted with Diana in February 1997 for a spread in Vanity Fair magazine. Testino will auction his photo depicting a smiling Diana in a black dress in London this fall to raise funds for families affected by the destructive earthquake that rocked his homelandon Aug.

Peruvian photographer Mario Testino, who took the last official portraits of Diana, Princess of Wales, is set to auction off one of his images for charity.
