Throughout his career, Jonah Hill has been candid about his journey with weight management, having once tipped the scales at approximately 375 pounds.

Recently, fans were taken aback by Jonah’s drastic transformation, as seen in the initial teaser for his latest film, “Outcome.”

The 42-year-old actor revealed his new, lean physique in a photo alongside co-star Keanu Reeves. Reeves takes on the role of Hollywood legend Reef Hawk, while Jonah plays his crisis lawyer, Ira.

In the image, Jonah sports a shaved head and a full, grey beard, a dramatic shift from his typical curly brown hair and darker beard.

Set to debut on Apple TV on April 10, the film was recently promoted by Jonah at a rare red carpet event on Tuesday, marking his return to public appearances for this black comedy.

He continued to showcase his significant weight loss at the event, wearing loose-fitting jeans paired with a dark sweater.

Jonah Hill has left fans shocked by his ‘unrecognisable’ appearance in the first look at his upcoming film Outcome (pictured, right, with co-star Keanu Reeves)

He has long been open about his struggles with weight loss, having reportedly weighed 280 pounds at his heaviest (pictured, left, this week and right, in 2015) 

Outcome features Keanu as a Hollywood star named Reef who embarks on a journey of redemption after a mysterious video that threatens to cancel him emerges.

Jonah has undergone a major transformation in recent years, with exercise scientist and nutritionist Amelia Phillips estimating he has lost nearly 200 pounds, as reported by HELLO!

The actor, who is best known for his roles in Superbad and 21 Jump Street, has been open in the past about his fitness and wellness journey.

He candidly shared how he had battled body issues since his teen years, in a piece he wrote in his magazine Inner Child back in 2018.

The Moneyball star admitted he spent most of his young adult life being called ‘gross and unattractive’, adding: ‘I really believe everyone has a snapshot of themselves from a time when they were young that they’re ashamed of.

‘For me, it’s that 14-year-old overweight and unattractive kid who felt ugly to the world, who listened to hip-hop and who wanted so badly to be accepted by this community of skaters.’

After speaking to a nutritionist and adjusting his diet, Jonah went on to lose 40 pounds.

He told ABC News in 2012: ‘I wish there was some crazy thing I did, like a pill or a genie, but I went to see a nutritionist, and he told me what to eat to change my habits. I found that Japanese food was very helpful to me.’

The film premieres on Apple TV on April 10, and the actor made a rare red carpet appearance on Tuesday to promote the new black comedy where he showed off his slimmed down frame (pictured with co-stars Keanu Reeves, Cameron Diaz and Matt Bomer)

Jonah’s weight has fluctuated over the years after he originally kick started his weight loss back in 2011 (pictured in Superbad in 2007 when he was 23) 

Jonah lost 40 pounds in 2011 after speaking to a nutritionist and embracing Japanese food as part of his diet (pictured in December 2011) 

However, in 2016 the actor gained the weight back to play arms dealer Efraim Diveroli in War Dogs alongside Bradley Cooper and Miles Teller (pictured) 

The star also started running to ease himself into exercise. Appearing on Kidd Kraddick’s radio show he said he ‘started physically running instead of emotionally running’ as well as doing push ups.

After beginning with just ten push ups a day he eventually worked his way up to 100 reps per day.

The star admitted he struggled to cut out beer, confessing a pint is his ‘Achilles heel’.

Jonah has also been vocal about how his weight was linked to his identity as a comedic actor despite how important it was for his career and health to not be so big.

Speaking to Vulture in 2011 after losing 40 pounds, he said: ‘Being healthier came along with maturity and it’s hard because a lot of times people want you to be the guy you were when they met you.

‘And I love doing funny movies but I want to mature, literally, in how I treat myself. I’m not living in a frat house with a bong plastered to the table.

‘But all this stuff [points to his body] is just part of maturing in body and in mind. I just want to be a good man and to make my family proud. And, you know, I want to live a long time.’

However, in 2016 the actor gained the weight back to play arms dealer Efraim Diveroli in War Dogs alongside Bradley Cooper and Miles Teller. 

Jonah began boxing to stay in shape in 2017 after he was seen in snaps jabbing and shadow boxing with a personal trainer

Once the film was released, Jonah turned to pal Channing Tatum to ask how best to shed the weight once again. 

Speaking candidly on the Tonight Show he told Jimmy Fallon a year later: ‘I wanted to get in better shape, so I called Channing Tatum and said, “Hey, if I eat less and go to a trainer, will I get in good shape?”

‘[He said] ‘Yes, you dumb mother****er, of course you will. It’s the simplest thing in the entire world”.’

Jonah then began boxing to stay in shape after he was seen in snaps jabbing and shadow boxing with a personal trainer.

 Back in 2021, Jonah spoke up about body positivity and struggling with his body image over the years in a now deleted post. 

‘I don’t think I ever took my shirt off in a pool until I was in my mid 30s even in front of family and friends,’ he wrote on Instagram. 

‘Probably would have happened sooner if my childhood insecurities weren’t exacerbated by years of public mockery about my body by press and interviewers.’

He continued: ‘I’m 37 and finally love and accept myself.’

The star went on to say his message was for ‘the kids who don’t take their shirt off at the pool’.

‘Have fun. You’re wonderful and awesome and perfect. All my love,’ he concluded.

In 2023, the star discussed his fluctuating weight with his therapist Phil Stutz for his second feature directorial effort (pictured in 2009)

In 2023, the star discussed his fluctuating weight with his therapist Phil Stutz for his second feature directorial effort, the Netflix documentary Stutz.

‘When I was a kid, exercise and diet was framed to me as like, “There’s something wrong with how you look,”‘ the Winning Time director recalled.

‘But never once was exercise and diet propositioned to me in terms of mental health. I just wish that was presented to people differently.’

Jonah admitted growing up overweight ‘intensely f***ed me up,’ and inside he still feels like ‘a 14-year-old boy who’s very overweight and has acne and feels very undesirable to the world.’

‘​​Inherently, at my core, I’m still this unlovable person,’ he explained.

‘But the work is inching toward [realising] that it’s great to be this person. But that’s still very hard.’