Michael J Fox has put the brakes on the idea of starting up the DeLorean for more Back To The Future adventures.
The actor, 61, whose career and struggle with Parkinson's disease is the focus of the documentary Still: A Michael J Fox Movie, told Variety he doesn't think a re-boot of the franchise is a good idea.
'I don't think it needs rebooting because are you going to clarify something? You're going to find a better way to tell the story? I doubt it,' he said
Still, the star has adopted a philosophical attitude about any new projects.
'I'm not fanatical,' he explained, 'Do what you want. It's your movie. I got paid already.'
The five-time Emmy had already become the breakout star of the sitcom Family Ties when he was cast as teen time traveler Marty McFly in 1985's Back to the Future.
It was a critical and commercial success, earning more than $380 million at the box office worldwide.
He reprised the role, traveling forward in time in the second film which was panned by critics.
That didn't keep fans from pouring into theaters to see it, making Back to the Future: Part II the third highest grossing film of 1989.
The actor played dual roles as Marty and his ancestor Seamus McFly in Back to the Future: Part III, traveling back to the Old West to save Christopher Lloyd's Doc Brown from being murdered by a gunslinger.
Michael said if director Robert Zemeckis, 71, and his co-writer Bob Gale, 71, had thought about a fourth chapter, he most likely wouldn't have been able to participate.
'I was in the early stages of Parkinson's at that point, so I don't know that I would have wanted to take that on,' he revealed.
'Right after 'Part Three' had done well, there might have been conversations about it, but I never got involved in them.'
The actor was diagnosed with Parkinson's, a disorder that affects the central nervous system and affects movement in 1991.
He didn't reveal his condition until seven years later when a tremor in his left hand became to difficult to conceal while he was starring in the hit series Spin City.
The comic star briefly reprised his role as Back to the Future: Part III's Marty McFly for the teaser trailer for Lil Nas X: The Origin of Holiday a couple of years ago, telling the time traveling Santa, 'Whatever you do Nas, don't go to 2020.'
Michael officially retired from acting in 2021.
He posted a sweet photo of his family, including all four of his kids; Sam, 33, twins Aquinnah and Schuyler, 28, and Esmé, 21 as he wished his wife Tracy Pollan, 62, a happy Mother's Day.
'Happy Mother's Day. Every day we're together is a love fest. You're the best!! We love you the mostest!??????????'
Back to the Future will get a new life, not the big screen, but on the stage as a Broadway musical.
'There's no role for me in it, but I'll be cheering from the side,' the supportive actor said.