When an actor is critically acclaimed for his work, it's not just the talent that people see. It is the devotion that really makes the star dive deep into her character and convince us as a spectator of her story. While some are more persuasive than others, the best actors often go to dangerous extremes to create as authentic a performance as possible. Sometimes, the incredible transformations of how Christian Bale recently played the role of Dick Cheney in Adam McKay's Vice – and not for the first time. Here are 25 of the most extreme actor transformations.
. 1 CHRISTIAN BALE // THE MASCHINIST (2004)
Christian Bale's most extreme transformation is palpable for his portrayal in The Machinist . The Method actor played the role of an industrial worker who had not slept in a year and really looked worse. Bale lost 63 pounds in four months because he only had one can of tuna or one apple a day.
. 2 CHARLIZE THERON // MONSTER (2003)
In the role that Charlize Theron was more than just a pretty face, the actress played the real serial killer Aileen Wuornos, who completely changed her appearance. Apart from her facial differences, Theron gained 30 pounds for the part, eating mainly donuts and other trash. Her performance earned her an Oscar. It was not the last time Theron turned her body into a role; she won £ 50 to play a mother with post-partum depression for this year's Tully .
. 3 JARED LETO // DALLAS BUYERS CLUB (2013)
Jared Leto basically stopped eating and sank to 116 pounds to kill a transgender person with HIV in Dallas Buyers Club  to play. "I think the role has demanded that commitment," Leto said about the extreme diet plan. "It was about how it affects my way, how I walk, how I talk, who I am, how I feel, you know you feel very fragile and tender and insecure." He eventually won an Oscar for his performance.
. 4 TOM HARDY // BRONSON (2008)
Tom Hardy played for Brian Bronson, British realist, 42 pounds for Nicolas Winding Refns Bronson . He is said to have done so with the help of an ex-Marine who has motivated and trained him. Hardy said that while exercising he mainly ate chicken, rice, chocolate and pizza and gained about seven pounds a week
5. MATTHEW MCCONAUGHEY // DALLAS BUYERS CLUB (2013)
Matthew McConaughey lost some weight alongside co-star Jared Leto for his role as a real HIV-positive Ron Woodrooff in ] Dallas Buyers Club . Ultimately, he lost 38 pounds through diet and eating in small quantities. McConaughey went on to win an Oscar for his performance.
. 6 ROBERT DE NIRO // RAGING BULL (1980)
For one of his most iconic roles, Robert De Niro played the real boxer Jake LaMotta in Raging Bull and won an Oscar for his performance. In order to play this role, the actor was extremely wiped out by a strenuous exercise routine with the actual LaMotta. Then, to play the boxer in later years, De Niro put up 60 pounds. Director Martin Scorsese should be able to photograph the actor in the later shooting only briefly because he had to breathe and suffered general health damage
7. MICHAEL FASSBENDER // HUNGER (2008)
Michael Fassbender lost the role of true activist Bobby Sands in Steve McQueen's Hunger and lost more than 40 pounds. Sands took part in the Irish hunger strike in 1981 and died. For the role Fassbender limited himself to a 600-calorie diet and trained
8. 50 CENT // ALL THINGS FALL APART (2011)
To play a cancer patient in All Things the rapper lost 50 cents of his muscular body by losing 54 pounds , His method included a liquid diet and ran on the treadmill for three hours a day. "I had so much muscle power that it was hard for me to lose the definition, even though I got lighter and leaner," he said as he prepared for the role. I started running to quench my appetite. Towards the end it was really difficult. "
9th JARED LETO // CHAPTER 27 (2007)
To play Mark David Chapman, the man who murdered John Lennon had Jared Leto by eating much ice and other The actor has gained 67 pounds of junk food and eventually developed gout, which made it painful for him to go easy.
10. ANNE HATHAWAY // LES MISÉRABLES (2012)
Anne Hathaway was already skinny when she landed the icon role as Fantine, a factory worker who became a prostitute in Les Misérables For the part claiming to have eaten two small squares of oatmeal paste each day, she has for The last 13 days of shooting practically stopped eating, despite recording only 15 minutes of screen time despite the film's colossal 158-minute running time won an Oscar for the role
11 CHRIS PRATT // GUARDIANS OF GALAXY ( 2014)
Chris Pratt's weight fluctuated over the years, from his more vigorous Parks and Recreation view of his extremely torn figure in Guardians of the Galaxy . For the Marvel role, Pratt lost 60 pounds in six months of intense training and a change in diet, including plenty of water. "I've peed all day, every day," Pratt told Men's Journal . "This part was a nightmare"
12. CHRISTIAN BALE // AMERICAN HUSTLE (2013)
Christian Bale is known for his incredible role transformations, for American Hustle he won 43 pounds to play a Conman, he relied on junk food to achieve its "goal" weight. His performance earned him an Oscar nomination.
. 13 ROONEY MARA // THE GIRL WITH THE DRAGON TATTOO (2011)
To play the iconic role of Stieg Larsson's anti-hero Lisbeth Salander, Rooney Mara has her look for David Finchers The Girl With The Dragon Tattoo Really Changing The normally innocent-looking actress got her lip, eyebrow, nose and nipple pierced, her eyebrows bleached, her hair cropped and Mara was nominated for her performance for an Academy Award.
fourteenth MATT DAMON // COURAGE UNDER FIRE (1996)
In his breakout role, Matt Damon lost more than 50 pounds in three months to play a heroin addict in Courage Under Fire . His diet consisted of chicken, egg whites, broccoli and a baked potato daily, along with running 13 miles daily, which meant he weighed just 137 pounds during filming. "I've gone too far," Damon once said about his extreme diet. "I got sick and I would not do that again because it was just too much."
15th TOM HANKS // CAST AWAY (2000)
To prepare for his Oscar-nominated role in Cast Away Tom Hanks put up £ 40 for the first half of the film then Hanks had to lose the weight he gained – and then some – for a 55-pound weight loss. (When it went for Matthew McConaughey in weight for Dallas Buyers Club he named Hanks
16. JAKE GYLLENHAAL // NIGHTCRAWLER (2014)
Jake Gyllenhaal was named for his Appointed a reporter in Nightcrawler for a Golden Globe.
The actor lost about £ 20 to the film, essentially starving to invade his character's mindset, Lou. "I knew that Lou was hungry, literally and figuratively, so I came into the mode where I was always a bit hungry," revealed the actor.
17th NATALIE PORTMAN // BLACK SWAN (2010)
To play a turbulent ballerina in Darren Aronofsky's Black Swan Natalie Portman ate a couple of hundred calories a day, underwent a strenuous exercise regimen and eventually dropped 20 pounds. Portman went on to win an Oscar for her performance.
18th TOM HANKS // PHILADELPHIA (1993)
To portray a gay man with HIV in his Oscar-winning role in Philadelphia Tom Hanks shaved his head and lost 35 pounds. His fragile and sickly appearance only contributed to his amazing performance.
19th HILARY SWANK // BOYS DO NOT CRY (1999)
For her Oscar-winning role as Brandon Teena, a transgendered person killed in 1993 as a result of a hate crime, Hilary Swank underwent a dramatic one Transformation. Not only did she play a male, she literally lived as a man for a month to prepare herself. This included tying her breast and using socks as a prosthetic penis. She also took off to get a masculine figure. Kimberly Peirce, the director of the film, spent more than two years looking for an actress who could play this role; Swank won an Oscar for the role.
20th CHRIS HEMSWORTH // IN THE HEART OF THE SEA (2015)
Chris Hemsworth, who was best known for playing jacked Thor in the Marvel films, had to star in In become serious The heart of the sea . To do this, the actor dropped 33 pounds in just four weeks, which, he said, put both his body and mind to rest. "To do justice to the story, we somehow had to suffer and we did it," he said People . "In other words, not much acting was required, we were desperate."
21. EMILE HIRSCH // IN THE WILD (2007)
To play the late Christopher McCandless, Emile Hirsch and director Sean Penn decided that the actor made a journey similar to the real traveler for whom he played , should take into the wilderness . McCandless's experience in North America to Alaska led him to lose a dramatic amount of weight before he finally died in the wild. Hirsch dropped 40 pounds by not drinking, cutting sugar, and running five miles a day. "It took more willpower to lose that weight than to do everything I've ever done in my entire life," said Hirsch USA Today of his transformation.
22nd TOM CRUISE // TROPIC THUNDER (2008)
Tom Cruise had the help of prosthetics for his role in Tropic Thunder but the actor has changed his whole image a bit.
23rd CAMERON DIAZ // HIS JOHN MALKOWITSCH (1999)
Cameron Diaz was virtually unrecognizable with her normal blond curls, which turned into frizzy, red mess as the wife of a puppeteer (John Cusack) in Spike Jonze Being John Malkovich .
24th RUSSELL CROWE // THE INSIDER (1999)
Russell Crowe donned 35 pounds, shaved her hairline, bleached her hair and aged make-up stained liver spots and wrinkles for 20 years Part in Michael Mann's The Insider – a role that Crowe has earned, received an Oscar nomination
25. EDDIE MURPHY // COMING TO AMERICA (1988)
In addition to starring as Prince Akeem in John Landi's Coming to America Eddie Murphy also played the role of Saul, an older, whiter , Jewish man, who was hanging out with the other characters in the barbershop. This role led Murphy to continue playing and to play several characters in other films.