Portraying Laurie Partridge's younger sister Tracy, Suzanne Crough and Susan Dey shared many scenes together during the four season run of the popular TV show. Description from everythingsusandey.blogspot.ca. I searched for this on bing.com/images
Suzanne J. Crough (March 6, 1963 – April 27, 2015) was an American actress best known for her role as Tracy Partridge, from the hit television sitcom The Partridge Family, which ran from September 25, 1970 - March 23, 1974.
The Partridge Family Star Suzanne Crough Dies at 52