David Bruce Cassidy (born April 12, 1950) is an American actor, singer, songwriter and guitarist. He is widely known for his role as Keith Partridge, the son of Shirley Partridge (played by his stepmother Shirley Jones), in the 1970s musical-sitcom The Partridge Family, which led to him becoming one of pop culture's most celebrated teen idols and pop singers of the 1970s. He has since had a career in both acting and music. During and after The Partridge Family, he and Danny Bonaduce, who played his younger brother in the series, have remained close friends.