United Kingdom, Jan. 29 -- Michael J Fox doesn't "think about his legacy" because it's "other people's business".

The 64-year-old actor - who is best known for playing Marty McFly in the Back To The Future trilogy, as well as roles in Family Ties and Spin City - insisted he doesn't worry about how people will remember him when he's done.

He told the Los Angeles Times newspaper: "I'll be dead.

"My late father-in-law wrote a book once called Die Broke. The theory being spend all your money now.

"I don't mean just money. Your gift, your nectar. Spend it all now, and spend it on your kids, on people you love. I don't think about legacy."

Michael was diagnosed with Parkinson's disease in 1991, and has since established his Michael J. Fox ...