Mark McClure is an American actor best known for his roles in popular films and television series. He gained fame for portraying Jimmy Olsen in the Superman film series during the late 1970s and early 1980s. His work in the Superman franchise helped establish him as a recognizable face in Hollywood. In addition to his role as Jimmy Olsen, McClure appeared in various other projects, including the television series The Greatest American Hero. He has also made guest appearances in numerous shows, showcasing his versatility as an actor throughout his career.