51 years old (Born on May 12, 1973)
American, Actor; He is famous from The Facts of Life.
Dominic Monaghan was his roommate for a while. Mackenzie later made a guest appearance on Dominic's TV show, "Lost" (2005). Son of Patty Duke and John Astin. Was accepted to Johns Hopkins University, but did not enroll. Uncle of actress Alexandra Astin and Elizabeth Louise Astin. Brother-in-law of producer Christine Astin.Mackenzie Astin's Best Moments
Fun Facts About Mackenzie Astin
Has three other half brothers: David, Allen and Tom
Nephew of Ray Duke.
Brother of actor Sean Astin.