Michael J. Fox took the stage at his own charity event this weekend at New York City's Waldorf-Astoria and played guitar on the Chuck Berry classic, "Johnny B. Goode."
Yup, just like he did in Back to the Future - vintage red guitar and all!
The 50-year-old actor, who became a megastar as Marty McFly in the classic '80s film and its trilogy, has since become the face of Parkinson's Disease research.
Make no mistake, Marty was in the house Saturday night.
Watch what might be the coolest video ever below ... and hang in there because after the first minute or so, the video and sound become much crisper ...
Hey Chuck ... Chuck! It's Marvin! Your cousin, Marvin Berry? You know that new sound you're lookin' for? Well listen to THIS!