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David Bruce Cassidy (born April 12, 1950) is an American entertainer who was most famous in the late 1960's through the 1970's. He starred in the television series "The Partridge Family" as oldest son and lead singer Keith Partridge alongside his real life step mother, Shirley Jones. He was also the only member of the television family to actually sing. He had a younger half brother, Sean Cassidy who went on to some fame in the 1970's and 80's.
He had done a massive amount of sex and drugs at an early age so getting older wasn't much fun. His father, actor Jack Cassidy, died in a housefire caused by a cigarette.