Back To The Future stars Michael J. Fox, Christopher Lloyd, Lea Thompson and Tom Wilson reunite

Last year, much to the delight of fans, Michael J. Fox and Christopher Lloyd reunited for the first time in a long time at New York's Comic Con.

And now, even more of the gang have got back together - almost 40 years after they became legends in the sci-fi fantasy saga Back to The Future.

Lea Thompson and Tom Wilson joined Fox who played Marty McFly and Lloyd who starred as the wacky Doctor Emmett Brown in a rare appearance together at Fan Expo in Portland to reminisce about the franchise's legacy.

Thompson, who played Marty's mum Lorraine, took to social media following the reunion to share a series of pictures and videos with fans.

"Wow honestly had the best time today with my #bttf family... so many fun fan moments too," she captioned the post.

Unable to resist the moment, one of the videos featured Wilson recreating his role as Biff Tannen with his classic head-knock "Hello? Anybody home?" moment for the camera.

On his own Instagram feed, Wilson posted the same lead image captioned: "Okay, so this happened. 2023."

The moment was extra special as Fox was diagnosed with Parkinson's in 1991, however, he 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."