Greg Fischer is a minor character of "The O.C." . He was portrayed by Christopher Cousins. Story of the Character Edit Greg is the father of Holly Fischer, a former close friend of Summer Roberts and Marissa Cooper. Retrieved from "https://oc.fandom.com/wiki/Greg_Fischer?oldid=12347" Categories: The O.C. Wiki The O.C. Characters Minor Characters (Season 1) Male Characters Add category Cancel Save Community content is available under CC-BY-SA unless otherwise noted.