Ozzy Osbourne's cause of death has reportedly been determined. The former Black Sabbath frontman and reality TV personality died at 76 on Tuesday, July 22.

Ozzy Osbourne, the heavy metal and reality television star, died of a heart attack and had suffered from coronary artery disease and Parkinson’s, according to a death certificate filed at a registry in London.

Ozzy Osbourne's cause of death has been revealed to be a heart attack, according to his death certificate publicly filed in London on Tuesday. The document further noted that the Black Sabbath frontman and beloved Prince of Darkness also suffered from Parkinson's disease prior to his death at age 76 two weeks ago.