If you’ve ever watched a recent Hollywood movie, you may have looked at their body transformations and wondered how they did it. In this list we’ll give you the top 23 celebrity body transformations, right up to date in 2017.

Jared Leto Body Transformation : Dallas Buyers Club

ared Leto Celebrity Body Transformation
Jared Leto reportedly lost 30 lbs for his role as the emaciated side kick to Matthew Mcconaughey in his celebrated role in Dallas Buyers Club.

He got his weight down to an astonishing 116 lbs, which for a man of his size is dangerously low. He later confessed that he “basically didn’t eat anything” for a few months.

Like his famous co star, Jared wanted to totally immerse himself in the role and felt it necessary to see the changes in how he felt and acted by being so dangerously underweight. “It was about how does that effect how I walk, how I talked, who I am, how I feel. You know, you feel very fragile and delicate and unsafe.”

As you can see from the picture, Jared has later transformed himself in the other direction to become grossly overweight for later roles.

Now 41, he states he has slowed down and would not consider such dangerous body transformations ever again…

Chris Hemsworth

chris hemsworth body transformation

The astonishing body transformation you see in the picture above is taken from Chris Hemsworth’s role as Thor, vs his part In The Heart Of The Sea. There is an approximate difference of 40-50 lb in the 2 pictures – a truly staggering body transformation!

To get into shape for Thor, he was consuming upwards of 3500 calories a day – almost double the average daily intake – and even got to nearly 6000 per day when he was in heavy bulk mode. These were split into between 5 and 6 meals, spread just a few hours apart, throughout the entire day. Additionally, he picked up a heavy workout routine with an emphasis on building muscle mass.

For the skinny, emaciated Chris Hemsworth you see in the picture, he had to reverse the process and basically ate just brocolli, vegetables, some fruit and drank lots of water – a starvation diet. He couldn’t eat high protein foods because he was required to lose as much muscle mass as possible.

Matthew Mcconaughey In Dallas Buyers Club [47 lbs Weight Loss)

 matthew Mcconaughey Dallas Buyers club body transformation

When you think of Matthew Mcconaughey, you think of an actor that started out as a typical Hollywood Hearthrob, who later matured into more serious and weighty roles (literally as you will see shortly!) Over the years he’s produced an impressive range of roles, and has adopted his body to shocking degrees to suit.

Here is Matthew looking completely emaciated and sickly for his role in Dallas Buyers Club, where he played an AIDS victim. For this shocking role, Matthew lost an incredible 47 lbs to demonstrate the ravages of AIDS before there were medications to control the deadly disease.

He later described his motivation to lose such an astonishing amount of weight for the role :

“Through pure rage and by any means necessary this guy did what he had to do to self-preserve and stay alive,” he said. It was an inspiration to Matthew, who stated that he “chewed on a lot of ice” in order to lose the weight.

But that was just one of his incredible body transformations…

Matthew Mcconaughey Body Transformation : Fat, Bald, Slobby

matthew mcconaghey celebrity body transformations
Mcconaughey proved his versatility as an actor when he went from his usual fit self to a fat, overweight slobby character for his role in the movie Gold.

Here we see the full range of body and physical transformations that the impressive actor is prepared to undergo. Left: Dallas Buyers Club, Middle : For his role in Gold, Right : Normal

For his part in Gold , Matthew added 40 lbs to his normally super fit weight. He states that “I enjoyed getting into Kenny and doing my research and all of a sudden I looked in the mirror and was like, ‘You put on a lot of weight, McConaughey”

But it was all worthwhile. McConaughey is gaining worldwide recognition as one of the best actors in the world and is continually offered heavyweight roles. He received fulsome praise for his portrayal from the Director of Gold:

“He’s been turning in some of the best performances in the world right now,” said Gaghan. “So I thought ‘He’s going to bring so much to this — so much precision to the character.’ And he did.”

Renee Zellewegger Weight Gain : Bridget Jones Diary

renee zellwegger body transformation
For her role as Bridget Jones, Renee Zellwegger put on about 30 lbs in the space of about 3 months. She was told repeatedly by doctors that this was extremely unhealthy and even dangerous, but was so comitted to the role that she felt it necessary to go ahead.

As you can see from our picture, Renne Zellwegger’s weight is usually in the 7 – 8 stone range, and she is usually about a size 8 – 10. For the role of Bridget Jones, she had to baloon all the way up to size 14.

She was on a diet of 4000 Kcal per day – which for a girl her size is about 2-3 times the recommended amount. She wasn’t eating healthy foods either, and basically binged on nothing but junk food for 3 months, with no exercise.

She said of the experience:

“Did you see that movie about fast food, Supersize Me? I had a panic attack with all the specialists talking about how bad this is for you, long term, putting on that much weight in short periods of time and they’re all saying, ‘You must stop this now or you’re going to die’.”

Her body transformation ranks amongst one of the biggest for any movie role, even including the male actors too.

Charlize Theron Shocking Appearance Transformations

Charlize Theron: Mad Max Transformation

charlize theron mad max transformation
We can see here that she has transformed herself from a normally stunningly beautiful woman to a road living, female super warrior in Mad Max. After she won the part she decided that she would have to shave her head to carry off the role, nothing else would do!

At the premiere for the movie Theron stated:

“I just had this moment where I was like, ‘I need to shave my head! I can’t think about what I’m going to do with my hair in this movie. I’m going to be in the desert. I’m a new mother. Let’s just shave it,’”…”The next day we did it. I can’t even imagine doing it any other way.”

Charlize Theron clearly matches her male counterparts for commitment to the role. She states : “Every movie is its own animal and you have to respect it and treat it that way”.

The next slide will show this attitude even more!

Charlize Theron Monster Amazing Transformation

charlize theron monster transformation

The picture above is an overwight and heavily made up Charlize Theron compared with her normal appearance. Shocking!

As with all her roles, Charlize researched extensively and got to know Aileen Wournos as best she could through documentaries, books and interviews. She said of the role :

“It wasn’t about getting fat. Aileen wasn’t fat. Aileen carried scars on her body from her lifestyle, and if I’d gone to make this movie with my body—physically I’m very athletic—I don’t know that I would have felt the things Aileen felt with her body. It was about getting to a place where I felt closer to how Aileen was living.”

So she decided to add 30lbs of weight and totally immerse herself in the role. The hard work clearly paid off – her role in Monster is surely one of the most shocking and poignant performances by a mainstream Hollywood actress of all time. (If you haven’t seen the movie, you really must!)

Matt Damon Body Transformations

matt damon courage under fire body transformation

Here we see an underweight Matt Damon for one of his earliest breakthrough roles. He was required to look sickly and emaciated for his character of a solider who was adversely affected by war and addicted to hard drugs. Matt was so committed to the role that he put his health at risk : he famously lost 40 lbs to get the required look for the role, and for 18 months afterwards had to take specialised medication to fix his adrenal gland.

The commitment paid off however and Matt Damon is now one of the worlds highest paid movie stars, who is virtually guaranteed to make any film a success.

Matt Damon Body Transformation, From Overweight To A Fighting Machine

matt damon the informant body

For the Informant, he decided to go full on porkie pie and added an incredible 30 lbs of fat to his normal frame. “I just basically ate everything I could see for a few months,” he said after completing the role, and boy it showed. He even changed his hair colour and grew a pretty gross moustache to transform himself from one of Hollywoods hottest men to an overweight slob.

Years later Matt proved that he can change his body at will however when he got into the best shape of his life for Elysium, as you can see in the before after image above. He added about 30lbs in lean muscle mass, covered his body in mean looking tatoos and totally shaved his head for the role, and looked as mean as possible. The look worked and Matt was totally believable in the role of a slave fighting an army of Droids.

Russel Crowe Body Transformation

Russel Crowe Celebrity Body Transformation

Russel Crowe is another of the A List male Hollywood stars who regularly transforms his look for his acting role. His biggest transformation to date was perhaps for his role in Gladiator, compared to his appearance in 2017 where he was required to put on approximately 40 lbs for his role in the Nice Guys.

To add the required extra weight, Crowe was not too bothered and took it in his stride. He basically spent 3 months prior to the role eating as much junk food as possible and skipping any gym sessions.

In mid 2017 he is feeling the effects though and has recently lost about 30 of the 40 lbs he was required to put on for the role. He’s over 50 now and stated that it is getting harder to lose the weight repeatedly after getting overweight for the roles. He actually tipped the scales at over 120kg just after filming Nice Guys, the heaviest he has ever been – and has stated he never wants to experience being that fat again!

Zac Efron

These days it’s hard to picture Zac Efron as the teen star of High School Musical. For those who weren’t paying attention in the intervening years though, Efron seemed to transform overnight from that beanpole into a man’s man.

Efron claims that right now he is at his physical peak, and most of it is due to his idolization of Bruce Lee – a fascination with being “fast and light”.

Another major factor, Efron claims, is the fact that he has Dwayne “The Rock” Johnson as a gym partner. Nevertheless, Zac says it’s taken a ton of determination, hard work, and overcoming old habits to get where he is now.

Ryan Reynolds

Though he’s also portrayed more than one superhero, Ryan Reynolds was known for being substantially in-shape long before he took on the likes of Deadpool or even the Green Lantern. However, those who have followed his career long enough know that Reynolds used to be a pretty lanky dude, and only started getting in extreme shape when his Hollywood star grew bigger. But how did he do it?

The answer is disappointingly simple, actually. He says he just eschewed his old diet and (lack of) exercise routine, and actually started caring about his body. Starting with his role in Blade, the actor has out on more than 25lbs of muscle and shed virtually all of the extra fat on his body.

Ryan is reported to have used a special bulking diet to add 25 lbs of lean muscle.

Mickey Rourke

It’s always impressive when an actor previously thought of as an example of a celebrity who didn’t age well makes a comeback, and doubly so when they do so in such a way that brings them to a new level of fitness at the same time. This was the case for Mickey Rourke, who trained for at least an hour a day in a brutal resistance weight regimen in order to get in shape for The Wrestler.

Rourke previously entertained a professional career as a boxer, but the years leading up to The Wrestler were not kind to him and he’d lost his fighting figure. Nevertheless, when he took on the character of Randy “The Ram” Robinson, Rourke committed his body to the job at hand and trained with professional wrestlers to get back in shape.

Chris Evans

chris evans body transformation
Speaking of Marvel cinematic heroes, Chris Hemsworth isn’t the only leading man who got in insane shape for his depiction of a comic book character. Chris Evans – better known as Captain America – got pretty big himself, and probably is the only other star who can rival Hemsworth’s sex appeal for the average middle America housewife. Since Evans has been slim most of his life, it was a challenge to get up to size.

Evans claims that his workout hit every single muscle in his body, and that he would work two groups together each day, basically “destroying” those muscles with each session. Surprisingly, he stayed away from cardio for most of his fitness routine – fearing putting a dent in the gains he needed for the muscle mass.

Mark Wahlberg

As someone who has always been in pretty decent shape, Mark Wahlberg is pretty much the epitomy of celebrity body transformations, changing his body at will for each movie role. However it might not come as much of a surprise to most people that Mark Wahlberg was able to take his physique to a whole new level for the movie Pain and Gain. However, it certainly wasn’t easy.

Drawing from his own line of fitness supplements, the actor bounced back from a previous role which required him to slim down and got up to the fighting weight of 212 for Pain and Gain, which was still smaller than his intended size. He then proceeded to train 5 days a week, and ate upwards of 10 meals a day to maintain his size as he turned it into muscle.

Tom Hardy

Having played a bunch of roles which all required him to be in amazing shape in the past few years, Tom Hardy has gotten pretty cut up.

The work has paid off though – he’s now known for looking great in box office hits such as Mad Max: Fury Road, The Dark Knight Rises, Legend, and more.

Most iconic of the lot is probably his portrayal of Bane, and the actor had put on more than 40lbs since his slim figure in Band of Brothers in order to achieve the physique needed for that role as well as Bronson, where he played a famed boxer. Though other roles required him to trim down, he put on the 30lbs required for Bane in just 3 months.

Jake Gyllenhaal

Though he’s played a lot of physically-active roles over the years – each of which demanded high levels of fitness – there’s probably no role to date which has seen Jake Gyllenhaal in better shape than 2015’s Southpaw. Playing a world-champion boxer demands physical perfection, and Gyllenhaal didn’t shy away from the challenge. He describes the role as “one hell of a commitment”, and says it took effort to “get his head in the game”.

Naturally much of his workout regimen for the role was focused around boxing, though Gyllenhaal says he hadn’t done much boxing in his life before taking on the part. He says he “went full training camp mode”, and got in shape for actual fighting. His training lasted for about half a year, and took him from his normal size to that of a cut, lean fighting machine.

Christian Bale

Most of the items on this list detail stars who got in amazingly fit shape for movie roles, and there are entries about stars who lost a bunch of weight to be more healthy. This one, however, is quite a bit different. If you’ve seen the 2004 movie masterpiece The Machinist, you’ll know what we’re referring to.

Christian Bale, the muscular hulk of a man who squeezed into a skin-tight suit for his most famous role as Batman, dropped more than 60 pounds – going down to just 120lbs – for his role in the movie. He looks quite reminiscent of a concentration camp survivor in the film, and apparently he achieved this look by ingesting just an apple and a can of tuna each day. Apparently he was shooting for a loss of 5 more pounds but was advised to stop by his doctors, who stated that he could die if he continued. This is surely the greatest example of celebrity body transformations, though strictly not advisable to try and copy!

Gerard Butler

Few roles are more iconic for their sheer ferocity than Gerard Butler’s depiction of King Leonidas in the epic 2006 movie 300.

Since the main focus of the movie was the somewhat savage and always amazingly fit Spartans from ancient Greece, Butler had no choice but to attain a level of physical fitness that most can only dream of. In addition to changing his eating habits in order to gain weight which could be forged into lean muscle, Butler adhered to a workout regimen so insane that he claims he doesn’t plan on doing it “any time soon or, really, ever again.”

The workout consisted of 50 pull ups, 50 deadlift reps of 135lbs, 50 push ups, 50 box jumps, 50 floor wipers, and 50 single arm clean and press reps with 36lb kettlebells.

Kirstie Alley

Most people nowadays may not actually know Kirstie Alley for anything but her Jenny Craig commercials, but she should still be recognized for her achievements nevertheless. The actress and comedian battled weight for more than twenty years, after going into early menopause beginning in 1992. Between 2004 and 2007, the starlet lost more than 75 pounds.

After parting ways with Jenny Craig Alley regained 83 pounds, bringing her weight up to 228. Subsequently she lost more than 100 pounds, announcing the loss in 2011. She’s kept the weight off since, and has gone back to her roots by once again becoming a spokesperson for Jenny Craig in 2014.

Chris Pratt

As someone who pushed their way into stardom as a lovable goof, it’s kind of weird to think of Chris Pratt as a Hollywood hunk. However that’s exactly what he’s become since his tenure on Parks and Recreation came to a close – and his most recent roles have caused the previously flabby star to get into the best shape of his life.

From Jurassic Park to joining the ranks of Marvel elite as a Guardian of the Galaxy, Pratt is now taking on parts which set him closer to Chris Evans than Chris Farley. But how exactly did he actually get into that ridiculous shape? Well for one thing, Pratt claims he completely laid off beer for six months. Instead he drank endless amounts of water, and took on the help of both a personal trainer and a nutritionist.

Jennifer Garner

Another (albeit lesser known at this point) body produced by a superhero movie is that of Jennifer Garner, specifically when she was portraying Elektra in 2005.

Although the movie got mixed reviews from critics, no one doubted for a second that Garner was in amazing shape, as girls wanted to be her and boys wanted to just be in the same room as her.

Garner apparently employed a lot of cardio, resistance training, and interval workouts to garner the muscle and fitness needed for the role. She also trained in martial arts to learn the moves her character needed, and worked out six days a week.

Demi Moore

She’s been out of the direct spotlight for a while now, but Demi Moore’s transformation from just another sexy starlet to a serious hard body for her 1997 role in G.I. Jane is nothing to shake a stick at. The actress spent hours each day working her body into physical perfection, and did so under the tutelage of a real-life Navy SEAL. The stunts she performed in the movie – including her famous single-arm push ups – were all real, and all her.

Emily Blunt

Edge of Tomorrow may have had many fans of the edge of their seats, but a lot of men in the room certainly had to remain sitting for a bit after seeing Emily Blunt on the big screen. The actress got in incredible shape for her role in the Tom Cruise blockbuster, and she trained extremely hard to get there.

Her personal trainer, Jason Walsh, said that getting her to a point of real strength was important because the actress would be carrying around a “50 – 60 pound exoskeleton for a lot of the film.”

It was also apparently important to the actress to be able to “show up” Tom Cruise, who is known for maintaining a high level of fitness. The leading actor was impressed by how in shape Blunt was, and claimed that no one he’s worked with has ever prepared as well as Blunt did for a role.