McMahon was known for portraying villain Doctor Doom in 2005’s Fantastic Four and 2007’s sequel, Fantastic Four: Rise of the Silver Surfer. He also played Christian Troy in Ryan Murphy’s Nip/Tuck and Cole Turner in Charmed. His more recent credits were in The Residence and The Surfer.

McMahon’s wife Kelly McMahon announced on July 4 that her husband died “peacefully… after a valiant effort to overcome cancer.”