From Wikipedia: Susan Marie Olsen (born August 14, 1961) is an American television actress. She is best known for her role as Cindy Brady on the 1970s television sitcom The Brady Bunch for the full run of the show, from 1969 – 1974. Born in Santa Monica, California, the youngest of four children, with two older brothers Larry and Christopher (fourteen years older) and a sister Diane. Her brother Christopher was also a child actor, perhaps best known for his role in The Man Who Knew Too Much.