The 78-year-old, who appeared in the original films, said he would be up for returning if there was a good enough story, and the original team were all involved again.

"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."