Michael J. Fox reunites with 'BTTF' costar Christopher Lloyd at Comic Con

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Marty McFly and Doc Brown are ripping through the space-time continuum again - and it's still so emotional...especially all these years later.

Michael J. Fox and Christopher Lloyd reunited in the Big Apple on Saturday during a "Back to the Future" panel at New York Comic Con... and when the two former co-stars met on stage , they greeted each other with a big hug , which received thunderous applause from the fans.

Watch the clip...you see MJF alone at first, sitting on the couch, then he gets up when Chris comes out and wraps him around with open arms.

It's a super cool moment, and you can tell it meant a lot to both of them, especially by the way Mike came into the embrace. Then they sat down and chopped it up...would have continued to tell old stories about the trilogy, but especially about Pt. 1 (the classic).

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Michael reportedly said at one point..."You've given me my whole life," adding a poignant nugget about his Parkinson's disease. Mike said: "The best thing that ever happened in my life was this thing. Parkinson's is a gift. I told people it was a gift and they said, 'You're crazy ". I say, 'Yeah, but that's the gift that keeps taking.' But it's a gift and I wouldn't trade it for anything... It's not about what I have, it's about what I was given."

By the way, there's a musical "BTTF" coming to Broadway next year. The word is...it's awesome.