Shaun Cassidy is an American singer, actor, and television producer born on September 27, 1958, in Los Angeles, California. He gained fame in the late 1970s as a teen idol with hit singles like "Da Doo Ron Ron" and starred as Joe Hardy in the popular television series "The Hardy Boys Mysteries." Transitioning from his early music and acting career, Cassidy established himself behind the scenes, becoming a successful television writer and producer for shows like "American Gothic" and "Invasion." As the son of acclaimed actors Jack Cassidy and Shirley Jones, Shaun continues to be a respected figure in the entertainment industry.