<Li> Danny Bonaduce as Danny Partridge: vocals, bass guitar </Li> <Li> Jeremy Gelbwaks as Chris Partridge (season 1): vocals, drums </Li> <Li> Brian Forster as Chris Partridge (seasons 2--4): vocals, drums </Li> <Li> Suzanne Crough as Tracy Partridge: tambourine, percussion </Li>

Who played david cassidy's sister in the partridge family