The 63-year-old actor was diagnosed with the disease - which causes uncontrollable movements, such as shaking, stiffness, and difficulty with balance and coordination - in 1991

Michael J. Fox, the beloved actor known for iconic roles in "Back to the Future" and "Family Ties," has been living with Parkinson's disease since he was diagnosed in 1991 at just 29 years old. For the first seven years after his diagnosis,

Michael J. Fox admitted that maintaining his legendary dark sense of humor is actually a bit of work. The actor told People that it's "hard for me" but "I gotta keep it intact." Fox spoke to the outlet at his annual A Funny Thing Happened on the Way to Cure Parkinson's fundraiser Saturday.