Claim to fame:
Teen idol. Played Joe Hardy in the Hardy Boys TV series, had a hit song Da Doo Ron Ron in 1977.
Where are they now?
Married actress Ann Pennington 1977, divorced 1992, married Susan Diol 1995. Like his half-brother David Cassidy became involved in live theatre, worked on a few productions with him (Blood Brothers), then left acting completely to produce and write TV and films including American Gothic in 1995