Mackenzie Alexander Astin (born May 12, 1973) is an American actor. Astin was born on May 12, 1973, in Los Angeles, California, the son of actress Patty Duke and actor John Astin. His older brother is actor Sean Astin. He attended Ralph Waldo Emerson Middle School and University High School in Los Angeles. He is married to Jennifer Abbott Astin (nee Bautz). Mackenzie made his acting debut at age 9 in the TV movie Lois Gibbs and the Love Canal, but is probably best remembered for his television role as Andy Moffitt over four seasons from 1985 to 1988 on the popular sitcom The Facts of Life. He has made guest appearances on Lost, House, Psych, Grey's Anatomy, and NCIS.
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