Jonah Hill is looking really fit these days!

It’s no secret that his weight has gone up and down over the years, and it’s almost as if he could lose or gain weight at his own will. For his role in the 2016 film ‘War Dogs’, the 33-year-old reportedly gained about 40 pounds. 

© Twitter

But, that’s all gone now. He has once again gone and lost all the weight and is now showing off his sculpted muscles, and this is all thanks to his ‘21 Jump Street’ co-star Channing Tatum.

Last year, while appearing on ‘The Tonight Show Starring Jimmy Fallon’, he revealed that after his weight gain for the movie ‘War Dogs’, he wanted to get in better shape. He said, "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?'.”

© BCCL

To which Tatum replied, "Yes, you dumb motherfucker, of course you will. It's the simplest thing in the entire world.” Well, that was quite obvious. 

He honestly looks like a different person now. Just look at him!

My motivation for weight loss is skinny Jonah Hill. pic.twitter.com/8PJA2lGbgb

— Kathy Wang (@Blamely_q) June 12, 2017

Skinny Jonah Hill looks like hes dying on the inside. Get this man a slice of pizza pic.twitter.com/UOaHb9JdJT

— Sharp (@Sharp_tK) June 18, 2017

Jonah hill is weight loss goals.. bruuuh 😵 pic.twitter.com/KSDMwRGYMt

— Mark (@Mmartinez94Mark) June 16, 2017

Jonah Hill looks like the extra weight he lost was made up entirely of happiness. pic.twitter.com/WJWDwsCNip

— k (@krazyfrog) June 20, 2017

Jonah Hill at 1:33PM vs Jonah Hill at 1:34PM pic.twitter.com/yMh8HTmV6a

— Kevin Beckingham (@K_Beck_16) June 19, 2017

Good for him and all but this is the question on everyone’s mind.

how does jonah hill lose and gain weight so fast

— alina (@glossyfilm) June 19, 2017

We need some answers, Jonah! How the hell did you manage it?