WATCH: The emotional moment Back To The Future stars Michael J. Fox and Christopher Lloyd reunite

Much to the delight of fans, Michael J. Fox and Christopher Lloyd reunited this week - almost 40 years after they became legends in the sci-fi fantasy saga Back to The Future.

The pair - who appeared together at New York Comic Con to speak on a panel about the franchise's legacy - shared a hug as they met on stage, inciting a standing ovation from the crowd.

Fans quickly took to social media to express their love for Fox who played Marty McFly and Lloyd who starred as the wacky Doctor Emmett Brown.

On stage, the 61-year-old actor reminisced about working with Lloyd, sharing that their time together was the best part of making Back to The Future.

He described his co-star as "just genius" and said the pair had "immediate chemistry".

Lloyd was equally appreciative of his time working with Fox, who he called the "King of Exposition".

Fox was diagnosed with Parkinson's in 1991 but didn't go public with the news until 1998.

In a recent interview, Fox revealed that he's "in a really good groove" physically these days, but "every day is different."