Actor-singer Nick Jonas has revealed that a pre-dawn gym session with comedian Kevin Hart during the filming of Jumanji: Welcome to the Jungle was the most physically gruelling workout of his life — one that left him fighting the urge to be sick. Jonas made the candid admission on the Hey Jonas Podcast, hosted alongside his brother Joe Jonas.

What Nick Jonas Said

Recounting the episode, Jonas explained that Hart had invited him to train before their shoot day began. 'I was shooting the first Jumanji, and Kevin Hart invited me to come work out with him. He's like, we're going to get up at 6 a.m. before we go to work. I'm at the time, I'm 22 or 23. You got this. You know, Kevin's 10 to 15 years older than me, I think,' Jonas said on the podcast.

The then-22-year-old told himself he should be more than capable of keeping pace with someone a decade his senior. That confidence, he admitted, was quickly tested.

The Workout That Broke Him

'The first thing they do is they're like, all right, 12-minute sprint on the treadmill,' Jonas recalled. The session then escalated to gymnastic-style bar movements that left him bewildered. 'I'm like, what is happening? This was the most intense workout I've ever done.'

Midway through, Hart reportedly noticed Jonas was struggling. 'He's like, you good? Because he could see that I was like about to throw up. And I was like, yeah, I'm totally fine,' Jonas said. Rather than easing off, Hart reportedly pushed harder. 'I think he saw like blood in the water. It was like, let's go even harder. It took everything I had to be like, I'm not throwing up in front of Kevin Hart,' he concluded.

The Jumanji Connection

Jumanji: Welcome to the Jungle — the second instalment of the franchise — starred both Jonas and Hart alongside Dwayne Johnson and Karen Gillan, releasing in 2017. The film is based on the children's book Jumanji and its sequel Zathura, both written by Chris Van Allsburg. The franchise centres on a group of players who are pulled into a dangerous jungle game and must complete it to survive.

A Glimpse Into Celebrity Fitness Culture

Hart is widely known in Hollywood for his extreme fitness regimen, which has become as much a part of his public persona as his comedy. The anecdote from Jonas adds to a growing catalogue of stories from co-stars who have found themselves outpaced by the comedian in the gym. Notably, this is not the first time Hart's training intensity has made headlines — several actors have previously spoken about struggling to match his pace during shared workouts.

For Jonas, the episode appears to have been a defining, if humbling, moment — a reminder that age and pop-star physicality are no match for Hart's legendary workout discipline.