Chalk it up to their staggering age difference, but Scarlett Johansson and Sean Penn’s brief fling seemed to catch everyone off guard. The unlikely duo developed a casual relationship in 2011 -- shortly after Johansson's three-year marriage with Ryan Reynolds ended in divorce. News of their romance quickly dominated headlines, and the actress, who is 25 years Penn's junior, was unprepared for the media attention. "In my marriage, funnily enough, we had relative privacy,” she told Vogue in April. The scrutiny she received with Penn “was a little bit of an adjustment," she said. The pair survived only a few dates before calling it quits.