Jack Osbourne has broken his silence following the death of his father, Ozzy Osbourne, last month. "I haven't really wanted to post anything since the passing of my father. My heart has hurt too much," Jack, 39, wrote in an Instagram post early Wednesday, August 6, which he shared alongside a remembrance video of photos and clips of him with his father. Jack continued, "I'm gonna keep this short because he certainly hated long rambling speeches. He was so many things to so many people, but I was so lucky and blessed to be a part of a very small group that got to call him 'Dad.