 UPDATED January 4, 6:00 pm: 
 
 Princess Diana's 'mystery man' is no longer a mystery! The young man seen lounging with the royal in a candid 1970s photo that went up for auction on Friday was identified by Princess Di biographer Andrew Morton as a onetime Diana suitor who missed his chance. Andrew Morton, then the Star's royal correspondent and, of course, more famously her biographer, has emailed me to explain what happened: 
 
 "I was given the task of trying to identify the boy in the picture. UPDATE: The identity of the mystery man was confirmed to be Adam Russell, an Old Etonian and the great-grandson of former Prime Minister Stanley Baldwin. According to Andrew Morton, the royal biographer, “They kept each other company while the others went skiing and at the end of the holiday Adam was somewhat smitten but absolutely nothing happened." "But absolutely nothing happened." "When he arrived home a year later it was too late," Morton told The Guardian. "A friend told him, 'You've only got one rival — the Prince of Wales." On the ledge next to the couple is a bottle of Johnnie Walker whiskey, and the words "NOT TO BE PUBLISHED" are scrawled across it. According to the Daily Mail, the photo was likely taken on a Swiss ski vacation around 1979 or 1980, when the young future princess would have been 18 or 19. Slideshow: Princess Diana's life 
 
 The picture was sold to a British newspaper on Feb. 26, 1981, which matches the date written on the back of the photograph. That's two days after Diana and Prince Charles's engagement was officially announced by Buckingham Palace.
– An interesting photo of a teenaged Diana Spencer, taken years before she became a princess, goes up for auction later this month, reports the Huffington Post. It shows Diana, probably around age 18, relaxing in a ski chalet with a friend named Adam Russell, reports NBC News with help from the Guardian. A bottle of whiskey sits on a nearby windowsill. They weren't a couple, though Diana biographer Andrew Morton says Russell was "smitten" with her. The photo has "Not to Be Published" written across it, and it's expected to fetch at least $1,000 at New Hampshire's RR Auction house when a week of bidding ends on Jan. 24.