Sam Fox (son of MJFox), Michael J. Fox, Sam Fox's (R) mother, Sam Fox at the 2011 A Funny Thing Happened On The Way To Cure Parkinson's - Red Carpet at New York NY. (Footage by WireImage Video/Getty Images Entertainment Video)

Michael J. Fox and Tracy Pollan at the 2011 A Funny Thing Happened On The Way To Cure Parkinson's - Red Carpet at New York NY. (Footage by WireImage Video/Getty Images Entertainment Video)

INTERVIEW: Elizabeth Berkley explains why Michael J. Fox is truly a hero at the 2011 A Funny Thing Happened On The Way To Cure Parkinson's - Red Carpet at New York NY. (Footage by WireImage Video/Getty Images Entertainment Video)

Schuyler Fox, Michael J. Fox, Tracy Pollan, Sam Fox and Aquinnah Fox at the 2011 A Funny Thing Happened On The Way To Cure Parkinson's - Red Carpet at New York NY. (Footage by WireImage Video/Getty Images Entertainment Video)

Michael J. Fox and Matt Czuchry at the 2011 A Funny Thing Happened On The Way To Cure Parkinson's - Red Carpet at New York NY. (Footage by WireImage Video/Getty Images Entertainment Video)

INTERVIEW: Michael J. Fox say this event is a thank you to the foundation's supporters instead of a pitch, he describes what the foundation is working on now at the 2011 A Funny Thing Happened On The Way To Cure Parkinson's - Red Carpet...

Aquinnah Fox, Michael J. Fox,Sam Fox and Schuyler Fox at the 2011 A Funny Thing Happened On The Way To Cure Parkinson's - Red Carpet at New York NY. (Footage by WireImage Video/Getty Images Entertainment Video)

Michael J. Fox and Tracy Pollan at the 2011 A Funny Thing Happened On The Way To Cure Parkinson's - Red Carpet at New York NY. (Footage by WireImage Video/Getty Images Entertainment Video)

Jane Fallon, Ricky Gervais, Michael J. Fox and Tracy Pollan at the 2011 A Funny Thing Happened On The Way To Cure Parkinson's - Red Carpet at New York NY. (Footage by WireImage Video/Getty Images Entertainment Video)

Schuyler Fox, Michael J. Fox, Tracy Pollan, Sam Fox and Aquinnah Fox at the 2011 A Funny Thing Happened On The Way To Cure Parkinson's - Red Carpet at New York NY. (Footage by WireImage Video/Getty Images Entertainment Video)

Michael J. Fox and Tracy Pollan at 'Marvel's The Avengers' Premiere - 2012 Tribeca Film Festival Closing Night on 4/28/2012 in New York, NY, United States. (Footage by WireImage Video/Getty Images Entertainment Video)

Michael J. Fox and Tracy Pollan at 'Marvel's The Avengers' Premiere - 2012 Tribeca Film Festival Closing Night on 4/28/2012 in New York, NY, United States. (Footage by WireImage Video/Getty Images Entertainment Video)

Michael J. Fox and Tracy Pollan at 'Marvel's The Avengers' Premiere - 2012 Tribeca Film Festival Closing Night on 4/28/2012 in New York, NY, United States. (Footage by WireImage Video/Getty Images Entertainment Video)

Tracy Pollan and Michael J. Fox at A Funny Thing Happened on The Way to Cure Parkinsons at The Waldorf - Astoria Hotel on November 10, 2012 in New York, New York (Footage by WireImage Video/Getty Images)

Elvis Costello, Tracy Pollan and Michael J. Fox at A Funny Thing Happened on The Way to Cure Parkinsons at The Waldorf - Astoria Hotel on November 10, 2012 in New York, New York (Footage by WireImage Video/Getty Images)

Rachael Ray and Michael J. Fox at A Funny Thing Happened on The Way to Cure Parkinsons at The Waldorf - Astoria Hotel on November 10, 2012 in New York, New York (Footage by WireImage Video/Getty Images)

Denis Leary and Michael J. Fox at A Funny Thing Happened on The Way to Cure Parkinsons at The Waldorf - Astoria Hotel on November 10, 2012 in New York, New York (Footage by WireImage Video/Getty Images)

Michael J. Fox at the 'Late Show with David Letterman' studio in New York, NY, on 1/10/13. (Getty Images Entertainment Video)

Michael J. Fox at the 'Late Show with David Letterman' studio in New York, NY, on 1/10/13. (Getty Images Entertainment Video)

Michael J. Fox at the 'Late Show with David Letterman' studio in New York, NY, on 1/10/13. (Getty Images Entertainment Video)

Michael J. Fox with fans at the SiriusXM Radio studio in New York, NY, on 9/24/13. (Getty Images Entertainment Video)

Michael J. Fox with fans at the SiriusXM Radio studio in New York, NY, on 9/24/13. (Getty Images Entertainment Video)

Michael J. Fox, Tracy Pollan at 65th Annual Primetime Emmy Awards - Arrivals on 9/22/2013 in Los Angeles, CA. (Footage by WireImage Video/Getty Images Entertainment Video)

Michael J. Fox at the 'TODAY' show studio Michael J. Fox at the 'TODAY' show studio on February 05, 2013 in New York, New York (Footage by WireImage Video/Getty Images)