A photo showing a rare glimpse of Lady Diana before she was married into the Royal Family has surfaced. The photo will be up for auction later this month. It shows Diana lying in a bed with a male seated behind her. A bottle of whiskey sits on the window sill. The photo is dated February 26, 1981. London's Daily Mirror once owned the photo which was marked "not to be published." Many have suggested the other person in the photo is Diana's brother Charles. The photo will be auctioned as part of a photography sale by RR Auctions of Amherst, New Jersey later this month.