'Wicked' and 'Mamma Mia!' actor Chris Peluso died at the age of 40, months after it was revealed that he was battling schizoaffective disorder. "Michigan Musical Theatre family is heartbroken as we announce the passing of our dear family member/alum," the University of Michigan said. Schizoaffective disorder is a mental health condition with symptoms of schizophrenia and a mood disorder.