Julian McMahon 's cause of death has been revealed after the actor's sudden death at age 54. The actor's grieving family revealed he had died following a "private battle" with cancer. The much-loved actor is said to have died from lung metastasis as a result of head and neck metastatic cancer, according to a report from the Pinellas County Medical Examiner which has been obtained by PEOPLE. His death was ruled as natural. The actor, who was in Home and Away, Charmed and Nip/Tuck, died last week