Jack Osbourne is opening up about the moment he found out his dad died. It's hard to believe we're going on two months since rock legend Ozzy Osbourne passed away at 76 years old. But while the days go on for fans around the world, the Prince of Darkness' family is left thinking about their final moments with him... And in Jack's case, the moment he heard news of his father's death. On Wednesday, Jack opened up about the devastating moment in a video published on his YouTube account: "I woke up in Los Angeles to a knock at my house door, at around 3:45 in the morning.