We’ve grown up with today’s guest as Alex P. Keaton, gone back to the future with him (thrice!) as Marty McFly and laughed along with him on TV shows like Spin City and Curb Your Enthusiasm. When Michael J. Fox was first diagnosed with Parkinson’s disease, he was told he could work as an actor maybe 10 more years. Today, it’s been more than 20 years and he’s making his triumphant return to TV in a series for NBC next year. Since his 1991 diagnosis, Michael J. Fox has taken on his most important role yet: that of a tenacious advocate, mobilizing scientists, politicians and financial experts to work to find a cure for Parkinson’s. Have you followed Michael’s work with Parkinson’s disease? Do you or someone you know have Parkinson’s? Share your experience with it below!

— Katie