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.

While Jack and his other older sister, Kelly, 40, garnered fame after starring in MTV’s “The Osbournes” with parents Ozzy and Sharon, 72, Aimee chose not to participate in the show during its four-season run from 2002 to 2005.