Hill entered the realm of serious dramatic acting with his Oscar Nominated performance in 2011's Moneyball, and cemented his status with his second Oscar Nomination for the 2014 Martin Scorsese film, The Wolf of Wall Street.
The actor stepped out over the weekend looking nearly unrecognizable.
Here's a look at Hill's previous weight drop for the sake of comparison.
Rumours circulated Brad was the driving force behind his fitness overhaul, but Jonah later came out and said his weight loss was simply triggered by a new diet and looking after himself.
Hill looked noticeably fit in a navy tank top that showed off his toned arms.
Hill's transformation did not happen overnight, and we're seeing the results of a health and fitness regimen that he started nearly a year ago.
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It's uncertain whether he's losing the weight for a movie, which he has done in the past, or for personal reasons.
Last year, he made an appearance on "The Tonight Show Starring Jimmy Fallon", revealing, "I gained weight for this movie 'War Dogs, ' and then I wanted to get in better shape, so I called Channing Tatum and said, 'Hey, if I ate less and go to a trainer, will I get in better shape?'" Watch! Luckily, Hill had the ideal source of guidance: his #22JumpStreet co-star and All-American beefcake #ChanningTatum.
"I went to a nutritionist and I said, "I'll lose weight, I'll eat healthier and whatever, but figure out how I can drink beer". "And [Tatum] said, 'Yes, you dumb motherf-ker, of course, you will". He didn't email back. "So I went through my sent messages, and it must have been "D-R", because instead of sending it to my nutritionist, I sent it to Drake". It's great that Hill takes his health and wellness seriously, and after seeing the results, it proves that if you put in the time and effort, you can improve your quality of life - and look damn good while you're doing it too!
We are at the apex of another Jonah Hill weight cycle.
"My motivation for weight loss is skinny Jonah Hill", tweeted another Hill fan.