Fox married actress Tracy Pollan on July 16, 1988. The couple has four children: Sam Michael (May 30, 1989), twins Aquinnah Kathleen and Schuyler Frances (February 15, 1995), and Esmé Annabelle (November 3, 2001).
On July 19, 2006, Fox appeared in a taped interview on ABC's "Good Morning America", defending a Senate bill that would expand federal funding for stem cell research. President Bush struck down the bill, his first veto in his presidency, later that day.
Doc Brown (Christopher Lloyd) and Marty McFly (Michael J. Fox) from the movie Back to the Future.According to the song "Elvis is Everywhere" by Mojo Nixon, Fox is the "Anti-Elvis": the only person in the world who does not have any Elvis in him.