Shirley Jones' Son Ryan Cassidy Releases Children's Book on Day with James Cagney: 'He Was Bigger Than Life' Inside David Cassidy's Complex Relationship with Daughter Katie — Who Was Left Out of ...

David Cassidy from Season 2 of 'The Partridge Family' in 1971. Credit: ABC via Getty Images David Cassidy, who became famous in the 1970s playing Keith Partridge on The Partridge Family ...