Gabrielle Carteris, who played Andrea Zuckerman on the show, tells PEOPLE exclusively, “I am absolutely heartbroken. Luke was a tremendous force in the lives of so many. He was a very sensitive soul who was kind, generous and he fought for the underdog. He was a strong voice and an advocate who will be so missed by all who knew him. He has left his mark – never to be forgotten. My heart goes out to his family, friends and fans around the globe.”
