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The Cassidys
Shaun Cassidy & Davis Cassidy
Shaun Cassidy (right) with Hardy Boys co-star Parker Stevenson
Katie Cassidy
Katie Cassidy
David Cassidy (The Partridge Family) and Shaun Cassidy (The Hardy Boys) are half-brothers. Their father was character actor Jack Cassidy. David's mother was character actress Evelyn Ward. Shaun's mother is singer/actress Shirley Jones, who played David's mother in The Partridge Family. David Cassidy's daughter, Katie Cassidy, is the star of The CW's Supernatural, and Lucy Ewing in 2009's big screen version of TV's legendary series Dallas.

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