Actor-Activist

Actor Michael J. Fox signs autographs at Stuart Little II premiere in July 2002. Fox, who suffers from Parkinson's disease, made headlines this week when a political ad in which he appeared was attacked by conservative radio commentator Rush Limbaugh who claimed Fox was "either off his medication or acting.

Personality Paula Zahn, Michael J. Fox, and Jane Kaczmarek attend the AARP Magazine 2006 IMPACT Awards in New York on Dec. 5, 2005. All three were honore dat the event.

Michael J. Fox arrives at the 19th Annual Rock and Roll Hall of Fame induction ceremony Monday, March 15, 2004, at New York's Waldorf Astoria.

Actor Michael J. Fox speaks to a reporter at the new Art of Disney Gallery at the World of Disney New York store, Friday, Feb. 24, 2006. Fox is surrounded by Disney Fine Art published by Collectors Editions. Proceeds from select auctioned pieces will benefit the Michael J. Fox Foundation for Parkinson's Research.

Actor Michael J. Fox listens intently to Professor Clive Sbendsen during a tour of the Waisman Center in Madison, Wis., on Tuesday, Feb. 1, 2005. Fox, who has Parkinsons disease, toured the center which is dedicated to research and treatment of developmental disabilities and neurodegenerative diseases.

Michael J. Fox poses for photographers Dec. 16 after the 2,209th star on the Hollywood Walk of Fame was dedicated to him. Fox won three Emmy Awards with NBC's "Family Ties" and later was cast as Marty McFly in the film series "Back to the Future."

Actor Michael J. Fox, center, reacts to a funny remark from a staff member in a science lab at the Waisman Center in Madison, Wis., Tuesday, Feb. 1, 2005, during a tour of the facility. Looking on are, from right, Wisconsin Gov. Jim Doyle; Deborah Brooks, executive director of the Michael J. Fox Foundation; Professor Clive Sbendsen, rear behind Fox; and Marsha Seltzer, director of the Waisman Center.

Actor Michael J. Fox meets staff including Austin Johnson, a medical PhD student, right, in a science lab at Waisman Center in Madison, Wis., Tuesday, Feb. 1, 2005. Fox, who has Parkinsons Disease, toured the facility with Wisconsin Gov. Jim Doyle and met with scientists there. The center is dedicated to research and treatment of developmental disabilities and neurodegenerative diseases.

Actor Michael J. Fox attends the Vanity Fair Party to celebrate the 2005 Tribeca Film Festival, held at the State Supreme Courthouse, Wednesday, April 20, 2005, in New York.

Michael J. Fox gets a hug from "Spin City" co-star Heather Locklear on their final show together, which was broadcast May 24, 2000.

Actor Michael J. Fox, right, performs "Johnny Be Good" with musicians Elton John, left, and Billy Joel Wednesday, April 21, 2004 during the annual Rainforest Foundation benefit concert at Carnegie Hall in New York.

Michael J. Fox shakes hand with supporters, Wednesday, July 13, 2005 at the U.S. Capitol. Fox joined members of the House and Senate to urge passage of stem cell research legislation. Stem cell research on human embryos holds the most promise in the search for cures for a list of diseases, including Alzheimer's, Parkinson's, diabetes and some types of cancer. Fox suffers from Parkinson's disease.

Actor Michael J. Fox, center, address members of the media during a press conference, Wednesday, July 13, 2005 at the U.S. Capitol. Also taking part, are; Rep. Diana DeGette, D-Colo., left,; Sen. Tom Harkin, D-Iowa, second from left; Rep. Michael Castle, R-Del, behind Fox; Sen.Arlen Specter, R-Pa., and Sen. Dianne Feinstein, D-Calif., right.

Actor Michael J. Fox, left, poses with former first lady Nancy Reagan during a mock presentation at the Juvenile Diabetes Research Foundation's tribute to Nancy Reagan, Saturday, May 8, 2004, in Beverly Hills, Calif. Reagan was honored for her commitment to stem cell research and finding a cure.

Actor Michael J. Fox speaks to reporters at the Juvenile Diabetes Research Foundation's tribute to former First Lady Nancy Reagan, Saturday, May 8, 2004, in Beverly Hills, Calif. At left is a poster of a Diabetes awarenes ad featuring actress Halle Berry. Reagan was honored for her commitment to stem cell research and finding a cure.

Michael J. Fox, center, enjoys Splash Mountain at the Magic Kingdom with his twin daughters Aquinnah Kathleen, 10, left, and Schuyler Frances, right, his son Sam, 15, background, and his wife, actress Tracy Pollan on Friday, March 25, 2005, at Walt Disney World Resort. Fox and Pollan met when she played his girlfriend on the popular TV series "Family Ties" in the 1980s.