“I tried to do that whole like dehydration thing,” he explained to hosts Angela Hartnett and Nick Grimshaw.

“It’s like what athletes do – to try and lose weight really quickly. But one of the side effects of it is it really accentuates the work you’ve been doing in the gym.”

Some sportspeople, like bodybuilders, dramatically cut their water consumption right before competing. This sometimes gives the appearance of a leaner physique, but it doesn’t make you lose any actual fat – and we hope we don’t need to tell you that dehydrating yourself is not good for your health at all.

Per the NHS Royal Devon University Healthcare, dehydration can sometimes make people “seriously ill”, possibly even leading to kidney issues.

Nonetheless, actors have long tried the trick for topless scenes.

Hugh Jackman, who was working on another Marvel movie Wolverine at the time, told Stephen Colbert: “You increase your water intake to, like – I’m trying to think what the gallons is – but you have about 10 litres of water, which is, what? Three gallons of water a day?

“And then you stop about 36 hours before you shoot. But, because you’ve drunk so much water, you are peeing, all the time.”