Well this is a joy – Michael J. Fox and Christopher Lloyd reunited after all these years, and all those time-travelling capers.

The pair, now some 20 years on from the first ‘Back To The Future’ movie, released in 1985, have paired up for a new ad for Toyota.

In it, they discuss the predictions from 'Back To The Future II’, and which of them have come to pass.

3D movies? Check. Fingerprint technology? Check. Fax machines? Well, Lloyd still uses his, at least.

The video is a teaser for a full-length ad that will debut on October 21 – the same date that Marty traveled to in the second movie back in 1989.

This delightful blast from the past follows news that Lloyd would definitely be up for the long-talked-about 'Back To The Future IV’.

Sure, it’s not happening (yet) but if it were, the 77-year-old star be back playing Dr. Emmet Brown in an instant.

“I would love to do Doc again, no question,” he told The Hollywood Reporter.

“It’s tough to come up with an idea that contains the excitement of the original three.

“So it would be a real challenge for the writers to come up with an original 'Back to the Future’ story that has the same passion and intensity and excitement as the other three. But it could be done, you never know.”

He reckons Michael J. Fox would be up for it too.

“I think regardless of the Parkinson’s, he’d probably jump on the role and he’d be great. I can’t see doing another sequel without him. I would certainly want Bob Zemeckis directing it, Bob Gale writing it and the other principals being involved.”

Fox, 54, was diagnosed with Parkinson’s Disease in 1991, a year after 'Back To The Future III’ was released.

He now balances his acting with campaigning to find a cure for the disease through his Michael J. Fox Foundation.

Read more
- Lucasfilm want female Star Wars director
- Why Jennifer Lawrence needs to speak out about pay inequality
- Fans make working replica of Thor’s hammer

Image credits: Toyota/Rex Features