After Julian McMahon died July 2 following a private battle with cancer at age 56, his ex-wife Brooke Burns—with whom he shares 25-year-old daughter Madison—paid tribute to the late Charmed actor.

A cause of death has been revealed for Aussie actor Julian McMahon, who played Dr. Doom in two “Fantastic Four” movies and Christian Troy in the TV drama “Nip/Tuck,” among other roles. McMahon died of cancer, according to a statement from Kelly McMahon, his wife.

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.