Appearing on The Graham Norton Show, Whitehall opened up about what it was like to train with the 6 ft 5" giant.
"I did a film with The Rock, yes," he explains. "He's the best man I've ever met... He's amazing, he's the kindest guy. He has this gym that he travels with, which I got to go into, which I felt very honoured to be invited into the 'Iron Paradise.'"
"One day on set he was like, 'do you work out?' And I was like, 'yep, yep.' Old 'Quadzilla' here! And then he invited me round to the gym, and I went around, and these machines are enormous. He had taken all of the weights off all of the machines, so it was just the bars. Even then I was like, 'I don't think I can manage those.' So I went in the corner and got onto an exercise bike, and popped in an audiobook. And he's in the other corner with like a chain around his neck, and he's crunching all of this iron and listening to rap music. And I'm over there, like, on a Call the Midwife [bike], pootling along!"
Clearly The Rock enjoyed his time with Whitehall, sharing the interview on Twitter. However, he also added a crucial detail that the Brit failed to mention. "Funny stuff," he tweeted. "True story though. My Jungle Cruise co-star @jackwhitehall's intro to my infamous Iron Paradise. (Jack excluded the part where he pee'd on himself a lil' during his first rep)."
Yup, Whitehall couldn't contain himself.
To be fair, we'd probably piss ourselves if we ended up shifting tin with The Rock...