Tom Cruise has been "training for a year" for his role in 'Mission: Impossible 6'.

Tom Cruise

Tom Cruise

The Hollywood icon has reprised the part of IMF agent Ethan Hunt for the latest movie in the money-spinning franchise and producer David Ellison has revealed the lengths Tom has gone to for one particularly demanding scene.

He told Collider: "What Tom is doing in this movie I believe will top anything that's come before. It is absolutely unbelievable - he's been training for a year.

"It is going to be, I believe, the most impressive and unbelievable thing that Tom Cruise has done in a movie, and he has been working on it since right after 'Rogue Nation' came out. It's gonna be mind-blowing."

David's comments come shortly after it was confirmed Henry Cavill has joined the cast of 'Mission: Impossible 6'.

Henry's appearance in the new movie was revealed during an Instagram exchange shared by the project's director Christopher McQuarrie.

Taking to the photo-sharing app late last week, the director posted a photo of himself standing on some rocks with the caption: "Say, @henrycavill. Had a thought. Curious if you're interested in a role in the 6th installment of Mission: Impossible. No pressure. (sic)"

Henry subsequently said in the comments: "How can I say no to a man with such perfect hair..... (sic)"

Christopher quickly replied to the star to make sure he was well aware of the perilous tasks that await him.

He wrote: "@henrycavill excellent. Just a few caveats: must enjoy extreme heights, high speeds, motor vehicles of all varieties (especially aircraft), practical stunts, firearms, and sporadic exposition. All good? (sic)"

Henry responded: "@christophermcquarrie only if I get to fly for real. (sic)"

Then, Christopher wrote: "@henrycavill I do believe I specified practical stunts. You in? (sic)"

And Henry responded: "Oh ok.....I'm in! (sic)"