In the first film, in 1985, Marty plays guitar with his group The Pinheads

In the Back to the Future film franchise, Marty McFly is the youngest of three children of George McFly and Lorraine Baines-McFly. He has a brother, Dave McFly, and a sister, Linda McFly. In addition, he has uncles Milton, Toby, and Joey, and aunts Sally and Ellen (Ellen was born in 1956, so wasn’t in the first movie). Joey serves a prison sentence in 1985 and has been denied parole again. In the first movie, Lorraine is 17 (nearly 18), Milton is 12, Sally is 6, Toby is 4, and Joey is 1. Ellen was born a year later.