Keanu Reeves says John Wick 4 is the 'hardest physical role' he's ever had to play

Keanu Reeves has revealed the next instalment of the John Wick franchise will pack the biggest punch yet.

"John Wick: Chapter 4 has the most action of any of the [John Wick] films, which is saying a lot," Reeves said.

"And it’s more by a good margin. It’s a big show."

So strap yourselves in for a high-octane thrillfest, because if this is wild in comparison then we are in for one hell of a bumpy ride.

Reeves, known for doing his own thrilling stunts, revealed that shooting the upcoming Wick flick was gruelling, but oh-so worth it.

"John Wick: Chapter 4 was the hardest physical role I’ve ever had in my career so far," Reeves said.

"They really trained me up to be able to have, what we call, the 'toolbox'."

What Reeves means by 'toolbox' is his already impressive skill set of stunts.

But that skillset has now been expanded to include a plethora of high-speed car chases and a few stunts that would probably make Vin Diesel say something like: "What in the 2 Fast 2 Furious!?"

Reeves revealed they took it to the 'next level' for the fourth instalment.

"There’s 180s, forward-into-reverse 180s, reverse-into-forward 270s, [and] drifting. So it was really fun to get a chance to learn those skills, and to play," he said.

Another key factor to the film is the dynamic struggle between hero and villain.

Enter Hong Kong action icon Donnie Yen as he takes up the role of Wick's newest frenemy, Caine.

He's an ex-assassin and an old pal of Wick's, and, according to stunt coordinator and second unit director Scott Rogers, it makes for an explosive pairing.

Rogers reckons Yen 'brings 'master level' fighting abilities' to his films'.

"When you add that to the many years of John Wick training that Keanu Reeves has invested, you end up with something very special."

So just how special? Well, Reeves sums it up by calling the film 'banana cakes'.

"John Wick: Chapter 4 is our [magnum] opus. Oh my god, it’s crazy, man," he added.