Julian McMahon 's cause of death has been revealed. According to a Cremation Approval Summary Report from the Pinellas County Medical Examiner's Office in Florida obtained by PEOPLE, the Australian actor, best known for roles on Nip/Tuck and Charmed, died from lung metastasis as a result of head and neck metastatic cancer.

McMahon was born in the 1960s, into the highest portions of the Australian upper crust: His father, Sir Billy McMahon, served as the country’s Prime Minister from 1971 to 1972, and his mother, Lady Sonia McMahon was a prominent (and infamously intimidating) socialite and philanthropist.