Kirstie Alley – Actress, Spokeswoman
Kirstie Alley won over audiences with her roles in the Look Who’s Talking movies and her iconic part on Cheers, making her a true Hollywood staple. But when she started gaining weight, the roles dried up for several years, which was a tough reminder of how unforgiving the industry can be.
She decided to take things into her own hands and joined the Jenny Craig program, eventually losing 75 pounds over three years. That success led her to become the spokeswoman for Jenny Craig, and her story ended up inspiring a lot of people going through similar struggles.
Jonah Hill – Actor
Jonah Hill got famous playing the lovable, slightly pudgy guy in Superbad, and his weight was kind of part of his whole thing. But he’d wanted to lose it for a long time and just couldn’t figure out how. The push he finally needed came from his 21 Jump Street co-star Channing Tatum. Jonah called him up and asked if eating less and working with a trainer would actually get him in shape. Channing’s response was blunt: “Yes, you dumb mother****er, of course you will.” That was apparently all Jonah needed to hear. He got on a solid gym routine, cleaned up his diet, and it worked.
Jessica Simpson – Singer, Actress
Marriage and motherhood brought Jessica Simpson a lot of joy over the years, but also some weight gain she struggled to deal with for a while. She eventually worked with celebrity trainer Harley Pasternak, who got her started on a daily walking routine, beginning at 6,000 steps a day and building up to 14,000, which gradually helped her reshape her body while juggling life as a mom of three. Back in the early 2000s, she had already won over a huge fanbase with her role as Daisy Duke in the Dukes of Hazzard reboot, where her charm, talent, and physique made her a standout.
Adele – Singer
Adele made headlines recently for a pretty dramatic physical transformation. She says it came down to cutting out sugar, keeping carbs in her diet, and sticking to a regular workout routine. Some fans were actually sad about it, saying they missed the plus-sized Adele who had been such a big symbol of body positivity. Either way, her story is a good reminder that personal health choices can lead to real lifestyle changes, even when you’re living your life in the public eye. At the end of the day, Adele has always been known for her powerful voice and massive talent, and that hasn’t changed.
Seth Rogen – Actor, Comedian
Seth Rogen had to seriously transform his body to play a superhero in The Green Hornet, which was a pretty big ask given his whole lovable, chubby guy image. He was pretty straight up about it though: “It’s not a mystery that if you eat healthy food and exercise you will lose weight. It will work for anyone… People know how to lose weight, they just don’t and I embrace that mentality for the most part because I’m lazy.” He got the job done, but he never pretended it was some magical Hollywood secret.
Christian Bale – Actor
For the film The Machinist, Christian Bale lost 63 pounds to play the skeletal character Trevor Reznik, which stands as one of the most extreme physical transformations in Hollywood history. He was eating just one apple and a cup of coffee a day, and his original goal was to lose 100 pounds, but the production team stepped in and stopped him before he got there. It’s a pretty intense example of what some actors put themselves through, both physically and mentally, to make a performance feel real.
Raven-Symoné – Actress, Singer
Growing up on That’s So Raven meant Raven-Symoné had cameras on her constantly, and people didn’t hold back about commenting on her weight, even going as far as spreading pregnancy rumors during her early career, which caused her a lot of stress. As an adult, she worked with a personal trainer and lost 70 pounds, and she’s been open about how weight management goes beyond just food, pointing to things like cortisol and serotonin levels as part of the bigger picture connecting mental and physical health.
Charlize Theron – Actress
In recent years, Theron has taken on roles that pushed her body to extremes. She gained 30 pounds to play serial killer Aileen Wuornos in Monster, which won her the Academy Award for Best Actress in 2004. She later gained 50 pounds for Tully, proving she’s genuinely willing to physically transform for a role. What makes this even more interesting is that before any of this, she trained as a professional ballerina in South Africa and worked as a model, both of which required strict weight maintenance.
Chris Pratt – Actor
Chris Pratt was known for playing a lovable, slightly chubby character on Parks and Recreation, but he wanted to break into action-hero roles so he completely reinvented himself. He committed to six months of no alcohol, strict workouts, and personal training that included hours of daily swimming, boxing, and running. His shirtless selfies went viral and showed just how dramatic the transformation really was, going from average Joe to a lean, muscular leading man.
50 Cent – Rapper, Actor
For his role in the 2011 film All Things Fall Apart, 50 Cent lost 50 pounds to play a character with cancer. He did it by eating nothing solid, sticking to a liquid-only diet, and running on a treadmill for three hours every day. People were shocked by how different he looked, especially given that he’s always been known for being in great shape from his music videos and performances.
Jared Leto – Actor, Musician
Jared Leto is known for going all out when it comes to transforming his body for roles, but what he did for Dallas Buyers Club was probably the most extreme. To play an HIV-positive transgender character, he lost 40 pounds in a month by severely restricting what he ate. He posted updates about it online, calling it a form of self-discipline and a meditative experience, even as doctors were warning him about the serious health risks involved.
Missy Elliott – Rapper
Missy Elliott shed 30 pounds on a health-focused weight loss journey, and she says the changes improved her skin, energy, and overall well-being. She cut out juices and soda and only drinks water, stopped eating bread, and keeps treats to just two cupcakes a month.
Zach Galifianakis – Comedian, Actor
Zach Galifianakis, known for his self-deprecating humor and fat jokes, lost 50 pounds by making some pretty simple changes. He cut out alcohol, ditched the junk food, started walking more, and added basic strength moves like squats and lunges. He managed to get healthier and boost his energy without losing any of what makes him funny.
Drew Carey – Comedian, TV Host
After finding out his weight was putting him at risk for Type 2 diabetes, Drew Carey decided it was time to make a serious change. He switched to a low-carb diet and started running and walking six days a week, which ended up working really well for him. He lost 80 pounds and went from a size 44 pant to a 34. Carey, known for The Drew Carey Show in the ’90s and his long run hosting The Price Is Right, had stayed pretty much the same size for most of his career, making the transformation even more noticeable.
Boy George – Singer
Boy George, the flamboyant frontman of Culture Club in the ’80s, had a well-known history of substance use during his heyday, which eventually led him to shift his focus onto food instead. At 50, he decided to get serious about his health and weight by cooking all his meals from scratch, cutting out processed foods, keeping a close eye on his sugar intake, and drinking plenty of fizzy water. The approach was straightforward but strict, and it paid off with a real physical transformation while he kept his iconic style intact.
Gabourey Sidibe – Actress
After being diagnosed with Type 2 diabetes, Gabourey Sidibe had stomach surgery and lost 50 pounds, but she’s been clear that it wasn’t a “shortcut.” She puts in real work alongside it, hitting the gym regularly and swimming to keep the results going. She first got everyone’s attention playing a pregnant 16-year-old in Precious, which landed her an Oscar nomination.
Mariah Carey – Singer
After having twins with Nick Cannon, Mariah Carey worked to lose her post-pregnancy weight. She reportedly tried Jenny Craig and lost 25 pounds, though rumors later spread that she also had gastric sleeve surgery. Mariah never confirmed that, but either way, it shows how much pressure celebrities are under to look a certain way in the public eye.
Khloé Kardashian – Reality Star
Khloé Kardashian worked with a personal trainer and lost 40 pounds, using the criticism she faced as motivation to keep going. She never thought of herself as a fitness role model, but her transformation ended up inspiring a lot of fans to take their own health seriously. She even documented the whole journey on her reality show Revenge Body, which is pretty remarkable for someone who often felt overshadowed in a family where image is everything.
Wendy Williams – TV Host
Wendy Williams, host of The Wendy Williams Show, is no stranger to the pressure of looking a certain way in the spotlight. She went through her own weight-loss journey guided by a blunt personal mantra: “Just push back, fatso. Just stop eating so much.” That mindset helped her lose 50 pounds over several months, showing just how much mental toughness and self-discipline play a role in reaching fitness goals.
Tyra Banks – Model, Entrepreneur
Tyra Banks built her career as a Victoria’s Secret Angel and was basically the image of the “perfect” runway body. But even she dealt with weight gain after having a baby, and her weight has gone up and down over the years like it does for a lot of people. To get back on track, she started writing down everything she eats, something her nutritionist suggested. It’s not about counting calories, just staying aware of what she’s actually eating. That simple habit helped her lose 30 pounds, and she’ll still tell you she loves ice cream.
Carrie Fisher – Actress, Writer
Carrie Fisher, best known for playing Princess Leia in the original Star Wars trilogy, dealt with a lot of personal struggles behind the scenes. When George Lucas brought her back for the reboots, she put in the work and lost 35 pounds to meet the physical demands of the role. She was also pretty vocal about Hollywood’s obsession with appearance, pointing out that the industry tended to value only a fraction of what an actor actually brings. After the original films, her career slowed down and she found herself turning to comfort eating while dealing with mental health challenges. Her criticism of body image pressures in Hollywood still holds up today.
John Goodman – Actor
John Goodman, best known for playing Roseanne’s husband on the classic sitcom, has gone through a serious transformation over the past few years. Working with a personal trainer, he lost 100 pounds by focusing on portion control, cutting out junk food, and staying consistent with exercise. He’s been upfront that this isn’t something that happened overnight and that healthy living is a lifelong commitment, not a quick fix.
Mo’Nique – Comedian, Actress
Mo’Nique, the Oscar-winning comedian and actress, has always been open about embracing her larger frame and even made it a regular part of her performances. Her workout routine was pretty well-rounded, mixing in weight lifting, yoga, jumping rope, basketball, and more. She’s been vocal about her belief that you don’t need pills, bands, or surgery to see real results, just dedication and consistency. Recently though, she took on a serious health challenge and ended up losing 80 pounds through pure discipline and hard work.
Rosie O’Donnell – Comedian, TV Host
In 2013, Rosie O’Donnell had gastric bypass surgery and lost 70 pounds. But she’s been pretty open about the fact that losing weight doesn’t fix everything, saying “All the stuff that you carry with you as a heavy person in the world will still be there when you’re a thin person in the world.” It’s a honest reminder that the physical part is just one piece of a much bigger picture, especially for someone who’s been in the public eye dealing with these struggles for years.
Queen Latifah – Singer, Actress, Rapper
Queen Latifah has built an impressive career in music, acting, and modeling based on her talent, not her looks. She’s been open about wishing she had learned more about nutrition earlier in life, saying that knowledge would have helped her take better care of her body sooner. Recently she lost 20 pounds by keeping things balanced, eating in moderation, and staying active consistently.
Oprah Winfrey – Media Mogul
Oprah Winfrey has always been open about her weight struggles, which is a big part of why so many people connect with her. Back in the 90s, she tried extreme liquid diets and dropped weight fast, but that obviously didn’t last. Now she’s focused on balance and actually taking care of herself rather than chasing quick results. She’s even admitted she doesn’t like working out, but her take on it is pretty honest: “You’re not going to love it but you do the thing you need to do to make yourself feel whole and well.”
Shonda Rhimes – Television Producer
Shonda Rhimes, the creator of Grey’s Anatomy, Scandal, and How to Get Away With Murder, lost 150 pounds and has been pretty open about how much she hated the whole process, both losing the weight and keeping it off. But whatever her feelings about it, the results speak for themselves, and it shows that even someone as busy and successful as she is can make their health a priority and actually follow through.
Jerry Ferrara – Actor
Jerry Ferrara, best known for playing Turtle on Entourage, decided to make a real change when he realized how much his weight was affecting his body. Over 10 months, he lost 60 pounds by working out consistently, quitting smoking, and keeping up with regular medical checkups. As he put it, “It’s hard to carry 200 pounds on that frame… I devoted myself to working out, quit smoking, committed to an annual physical.” His story is a solid example of how making health a priority, even after years of neglect, can turn things around in a big way.
Melissa McCarthy – Actress, Comedian
Melissa McCarthy, known for Bridesmaids and Mike & Molly, made some lifestyle changes as she got older to take better care of her health. She calls her routine a “super boring life,” but it works. She lost 75 pounds by exercising regularly and prioritizing sleep, going to bed early to stay energized and focused, and she now sits comfortably at a size 14, proving that simple, realistic habits beat extreme measures every time.
Mama June – Reality Star
Mama June from Here Comes Honey Boo Boo went through a pretty incredible transformation after getting weight loss surgery. She dropped 150 pounds by working with a nutritionist and personal trainer, cutting out things like soda and chips and building healthier habits that actually stuck.
Action Bronson – Rapper, Chef
Action Bronson lost 127 pounds during the coronavirus pandemic, dropping from around 400 pounds down to 249. He’s been open about it, saying “I’ve been a big boy my whole life and it got out of control… I got myself together and here we are.” The rapper and food personality just committed to the change and made it happen.
Busta Rhymes – Rapper
Back in 2020, during the pandemic, Busta Rhymes dropped nearly 100 pounds and shared his mindset with fans: “Don’t ever give up on yourself!! Life begins right now…I would never put out an album and not be in the best shape of my life. I respect myself too much and I respect y’all too much.” The guy who had been a chart-topping hip-hop icon had put on a lot of weight over the years to the point where fans barely recognized him, but he clearly wasn’t having it anymore.
Jenna Jameson – Entrepreneur and Former Adult Film Star
Jenna Jameson wanted to get back in shape after becoming a wife and mom, and she did not mess around. She dropped 80 pounds in six months by sticking to a ketogenic diet built around coffee, cottage cheese, scrambled eggs with cheese, arugula salad, and a lot of ribeye steak.
Kevin Smith – Filmmaker
After suffering a near-fatal heart attack in 2018, director Kevin Smith got a serious wake-up call. His doctor told him to lose 50 pounds, and he got to work, dropping 37 pounds quickly and knocking out the last 13 by finding foods he actually enjoyed eating.
Kelly Osbourne – TV Personality and Singer
Kelly Osbourne grew up on reality TV and dealt with constant harsh criticism about her weight. After going through rehab and working through personal struggles, she committed to her health by exercising regularly and watching her portions, which helped her lose 85 pounds. That kind of transformation changed how the public saw her and showed what staying consistent and taking care of yourself can actually do.