Julian McMahon (born 27 July 1968, in Sydney, Australia) is an Australian actor and former model. His father, Sir William McMahon was Prime Minister of Australia from 1971–1972. McMahon is best known for playing Cole Turner on the television series "Charmed", Doctor Doom in the 2005-2007 "Fantastic Four" movie series and Christian Troy on the series "Nip/Tuck".