As it hits World Parkinson's Day, Daily Express US has looked into Michael J. Fox, who was just 29 years old when he was diagnosed with the disease.

In May 2000, Fox launched the Michael J. Fox Foundation for Parkinson's Research ... to a guy who is like my brother, to a guy who is really like a father figure to me now." ...

"River Phoenix and his brother [Joaquin Phoenix] had a place ... to me when he became a huge star," he adds. For more from Michael J. Fox, pick up the latest issue of PEOPLE, on newsstands Friday ...

Michael J. Fox and Tracy Pollan's twin daughters Aquinnah ... as opposed to their older brother Sam Michael, 34, who is a producer. The youngest in the family is 22-year-old Esmé.