Jack Cassidy was an American actor and singer, known for his work in television and theater during the 1960s and 1970s. He gained fame for his roles in popular TV shows such as The Partridge Family, where he played the character of Reuben Kincaid. Cassidy was also recognized for his performances on Broadway, showcasing his talent in musicals. In addition to his acting career, Jack Cassidy was the father of three children, including the well-known actress David Cassidy. He was celebrated for his charismatic presence and vocal abilities, making significant contributions to the entertainment industry before his untimely death in 1976.