Michael J Fox has admitted that maintaining his dark sense of humour is becoming increasingly difficult as he continues his battle with Parkinson's disease. The 63-year-old actor made the candid admission whilst attending his foundation's annual A Funny Thing Happened on the Way to Cure Parkinson's gala in New York City on Saturday.

Michael J. Fox said that it is 'hard for' him to maintain a dark sense of humor while dealing with Parkinson's disease, but he does anyway. 'I gotta keep it intact,' he told PEOPLE at the Michael J. Fox Foundation's annual gala in New York City on Nov.

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.

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