​The Keymaker From 'The Matrix' Also Plays The Doctor In 'John Wick'

One of the most obvious is, of course, that John Wick chapters two and three reunited Keanu Reeves and Laurence Fishburne - aka Neo and Morpheus, two of the most iconic characters not only from The Matrix, but also kind of ever.

But they're not the only ones to have been brought back together through the John Wick series, the neo-noir 'gun-fu' films starring Keanu Reeves as the titular retired hitman seeking vengeance.

Remember the Keymaker who helped Neo out in 2003's The Matrix Reloaded?

He was played by Korean-American actor Randall Duk Kim, who, more importantly also crops up in the John Wick films, playing a doctor who treats John Wick in the first film.

It's a nice little link between the two film franchises - in fact, there are quite a few that eagle-eyed super fans have spotted.

That includes one Easter egg in the original John Wick film, where 'Neo' is the name of a character in a video game during the safe house scene.

He added: "I feel like there are all these different subtleties that I skipped over in Number Two, that I'd like to go back to on [chapter three] and show you the inner workings of different parts of New York.

"So rather than massive set pieces, I'd like to show you cooler and more intricate ones.

"I think it would be a mistake budget wise and creatively to just go big and blow up a freeway. That's not our gig. That's a comic book or a Bond gig. We want to show you cool and intricate details.

"What are those little details in everyday life? Hopefully - we make people look at garbage collectors and cleaner vans and homeless people a little differently now."