Jonah Hill looks so different on the set of his new series! The actor sported a mullet and showed off his amazing weight loss.

Hill is currently shooting the Netflix show Maniac with Emma Stone. And photos from the set show just how much Hill has slimmed down.

CLICK HERE FOR MORE BEFORE AND AFTER PHOTOS OF JONAH HILL ...

Of course, this is not the first time Jonah Hill has transformed for a role. He famously slimmed down before starring in Moneyball in 2012.

"It was just mostly diet," he told ABC News at the time. "I wish there was some crazy thing that I did, like a pill or a genie or something, but it was, unfortunately, I went to see a nutritionist, and he told me what to eat to change my habits and stuff… I found that Japanese food was very helpful to me."

Jonah Hill Before Jonah Hill looked noticeably heavier at the GQ Men of the Year Awards in September 2014 (Photo: Splash News).

Hill then gained about 40 pounds for his role in War Dogs. And when he wanted to lose the weight again, he asked his old pal Channing Tatum for advice.

HOW BEYONCE SLIMMED DOWN SO SOON AFTER GIVING BIRTH ...

"I gained weight for this movie 'War Dogs', and then I wanted to get in better shape, so I called Channing Tatum and I was like, 'Hey, if I eat less and go to a trainer, will I get in good shape?'" Hill told The Tonight Show last summer. "And [Tatum] was like, 'Yeah, you dumb motherf--ker, of course, you will. It's the simplest thing in the entire world. So he gave me the number of these guys."

Watch Jonah Hill discuss his weight loss on The Tonight Show.

Still, the entire weight loss process didn't go smoothly for Hill. He revealed on The Tonight Show that he once accidently emailed his food diary to Drake.

SEE MAMA JUNE'S INCREDIBLE TRANSFORMATION ...

"I went to this nutritionist, and the doctor was like, 'Do me a favor, write down what you eat every day, and email it to me at the end of the day. One night ... I wrote down like yogurt, salad, chicken-whatever," Hill continued. "... He didn't email back. He usually says, 'OK' or something. It must have been 'D-R,' cause it was doctor, and I'd sent it to Drake.

What do you think of Jonah Hill's before and after photos? Let us know your take in the comments section below!