Shirley Jones is an American actress. She was born on March 31st, 1934. She is mostly remembered for her role as Shirley Partridge in the Partridge family. Shirley Jones plays the mother of David Cassidy's character Keith and in real life is his step mom. Shirley was married to David's father Jack Cassidy from 1956-1974 and had three sons with him, Shaun, Patrick, and Ryan Cassidy. She then married Marty Ingels in 1977 and stayed married until he passed away in mid 2015. Her grandchildren are Katie, Beau, Meaghan, Caitlin, John, Roan, Caleb, Juliet, Lila and Marirn Cassidy.