​From Wikipedia, the free encyclopedia.   Peter Macdissi is an actor who was born in Beirut, Lebanon. His filmography consists mostly of television work, most notably playing long-time recurring character Olivier Castro-Staal on Alan Ball's hit HBO series Six Feet Under. In 2007 and in 2008, he was seen in Towelhead, a feature film which was written and directed by Alan Ball. The film was based ...