Ozzy Osbourne 's cause of death has been revealed after the rock icon’s funeral. The 76-year-old Black Sabbath frontman, who had been diagnosed with Parkinson’s disease in 2019, died on July 22 of a heart attack. The death certificate - which was filed by his daughter Aimee at a London registry - was obtained by the New York Times.

The former Black Sabbath frontman died of a cardiac arrest and "acute myocardial infarction," with coronary artery disease and Parkinson's disease with autonomic dysfunction listed as "joint causes" according to a death certificate obtained by The New York Times.