The actor, 55, was filming a high-octane stunt for the action film – subtitled Fallout – when he sustained the nasty injury, which he described on The Graham Norton Show last night.
“I was chasing Henry [Cavill] and was meant to hit the side of the wall and pull myself over but the mistake was my foot hitting the wall,” he recalled.
“I knew instantly my ankle was broken and I really didn’t want to do it again so just got up and carried on with the take.
“I said, ‘It’s broken. That’s a wrap. Take me to hospital’ and then everyone got on the phone and made their vacation arrangements.”
And it seems he is still injured, as he continued: “It’s still broken but I’m doing well.
“It’s not fully healed but we are shooting and we have a release date so I just have to keep going.
“I spent 8-10 hours a day, seven days a week in rehab because we still have some major stunts to do.”
One such stunt that has been completed is seemingly the most ambitious stunt the series has ever pulled off.
“There is one big set piece, which has been two years in the planning,” Cruise revealed.
“We do an aerial helicopter sequence, which in terms of action is the largest we have ever done.
“We were flying very low near rock faces and I was literally on Henry’s tail. It was incredibly exhilarating and dangerous.”
Cavill interjected: “I thought at one point, ‘ah, this is how I go but at least I will have been killed by Tom Cruise and it will definitely make the papers!’”
Mission: Impossible 6 is out in July.
