If you want to see if you can spot the difference yourself, the 4K re-release of Se7en will have a limited run at cinemas up and down the country throughout January, with the 4K UHD Blu-ray re-release hitting shelves on January 6. You can pre-order it from Amazon here .

David Fincher has used AI on Se7en's 4K release to fix something only the most extreme obsessives would have ever noticed in the first place.

There are definitely moments that you go, ‘What was I thinking?’ Or ‘Why did I let this person have that hairdo’?” Fincher said in a recent interview with The Associated Press. He’s OK with the film being a product of its time in most respects.

David Fincher discusses restoring 'Se7en' in 4K, redeeming his career after ‘Alien 3’ and casting Ned Beatty as serial killer John Doe.

"I may not be interested in Y and Z, but if I can use it for the sake of X - all tools, if they do what they say they're going to do, are good tools," the director says.