PHOTOS: 30 Jaw Dropping Celebrity Weight Loss Transformations!
1 of 7

Jonah Hill showed off his incredible weight-loss on the set of his new movie "Maniac" — looking thinner than ever after years of yo-yo dieting!
Photo credit: BACKGRID
2 of 7

The slimmed-down star's health regime still has him puffing cigarettes, but the former heavyweight "21 Jump Street Star" has also tried plenty of other tricks!
3 of 7

That included
bringing in a guru after
shedding 40 pounds in 2011 with a sushi-based, no-beer diet — and then gaining it all back!
Photo credit: BACKGRID
4 of 7

A pal told
The National ENQUIRER that the sessions he began in Oct. 2015 were supposed to help him get to the “root of his emotional issues so that he can keep the weight off for good this time.”
Photo credit: BACKGRID
5 of 7

But, as seen here, Jonah was still flaunting a very full figure by July of 2016. The star claims he finally had his diet breakthrough after asking "21 Jump Street" costar
Channing Tatum: ""Hey, if I ate less and go to a trainer, will I get in better shape?"
Photo credit: BACKGRID
6 of 7
7 of 7

“Leo has been a fan of colonics for a long time," the source told Rob, "and was a client of a celebrity colonic clinic on Spring Street in New York City" — adding that the celebrity stud insists the procedure "can also help with weight loss!"
Photo credit: BACKGRID
Jonah Hill showed off his incredible weight-loss on the set of his new movie "Maniac" — looking thinner than ever after years of yo-yo dieting!
The slimmed-down star's health regime still has him puffing cigarettes, but the former heavyweight "21 Jump Street Star" has also tried plenty of other tricks!
That included
bringing in a guru after
shedding 40 pounds in 2011 with a sushi-based, no-beer diet — and then gaining it all back!
A pal told
The National ENQUIRER that the sessions he began in Oct. 2015 were supposed to help him get to the “root of his emotional issues so that he can keep the weight off for good this time.”
But, as seen here, Jonah was still flaunting a very full figure by July of 2016. The star claims he finally had his diet breakthrough after asking "21 Jump Street" costar
Channing Tatum: ""Hey, if I ate less and go to a trainer, will I get in better shape?"
“Leo has been a fan of colonics for a long time," the source told Rob, "and was a client of a celebrity colonic clinic on Spring Street in New York City" — adding that the celebrity stud insists the procedure "can also help with weight loss!"