Michael J. Fox No one will ever replace the shorty-pants who played lovable conservative Alex Keaton on Family Ties and charming troublemaker Marty McFly in Back to the Future. With his cheeky confidence and effortlessly suave way with the ladies, all packed into a pair of tapered Levi’s, women of the ’80s couldn’t get enough of this boy from Burnaby (even as a hairy beast in Teenwolf).