Kelly Osbourne says death of her father Ozzy Osbourne is the 'hardest moment' of her life Kelly Osbourne has admitted that she "will not be ok for a while" following her father Ozzy Osbourne's death at the age of 76 last month. 4 August 2025 Kelly Osbourne has described her father Ozzy Osbourne's death as the "hardest moment of my life". Kelly Osbourne has reflected on the death of her dad Ozzy Osbourne The 40-year-old star shared an emotional post on her Instagram Stories on Monday (04.08.