Actor Julian McMahon, best known for his roles in "Nip/Tuck" and "Fantastic Four," has died at age 56 after a "valiant" battle with cancer.

He played a half-human, half-demon in the WB supernatural series “Charmed” and a playboy plastic surgeon in the FX series “Nip/Tuck.”

Julian McMahon’s Nip/Tuck co-star Joely Richardson shared some heartfelt memories of the actor following his death from cancer at 56. Richardson played Julia McNamara on the series, wife of Sean McNamara (Dylan Walsh), who runs a successful plastic surgery practice with Christian Troy (McMahon), with whom Julia has an affair.