photo courtesy of amazon.com It is a sad day in Playboy history as founder, Hugh Hefner has passed away. His death has been a cause of several hoaxes over the past few years but today, it has been confirmed. Hef, who was 91, passed away in his longtime Holmby Hills home, surrounded by family and friends, according to his rep. The cause of death was natural causes and he will be buried next to Marilyn Monroe . Hefner's career was seemingly revitalized with the hit E! reality show, "The Girls Next Door," which focused on his relationship with his three then-girlfriends, Holly Madison, Bridget Marquardt , and Kendra Wilkinson. The show lasted six seasons and made the girls household names. Holly went on to write two best-selling books, exposing her life as Hef's number one girl while marrying Pasquale Rotella and having two children. Kendra married former NFL-er, Hank Baskett and they have two children, as well as a few reality shows and some memoirs to her name....