Shaun Paul Cassidy (born September 27, 1958) is an American singer, actor, writer and producer. Cassidy starred in the television series The Hardy Boys Mysteries (1977–1979), Breaking Away (1980–1981) and a stint on the daytime soap General Hospital (1987). In the 1980s and 90s, Cassidy worked almost exclusively as an actor in the theater, performing on Broadway and in the West End of London. Since the mid-1990s, Cassidy has been a writer and producer in television, creating and producing a number of television series, including American Gothic, Roar and Invasion. He is currently the consulting producer on NBC's medical drama New Amsterdam. Cassidy is the eldest son of Academy Award-winning actress Shirley Jones and Tony Award-winning actor Jack Cassidy. His older half-brother was David Cassidy.