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© Getty Images
0 / 26 Fotos
50 Cent - According to the Daily Mail the actor lost almost 25 kilos to play the role of a young man with cancer in 'All Things Fall Apart' (2011).
© NL Beeld
1 / 26 Fotos
Hilary Swank - To play the role of a boxer in 'Million Dollar Baby' (2004), Swank underwent an intense training program to attain an athletic physique, gaining nine kilos in muscle tissue, according to Exercise Reports.
© NL Beeld
2 / 26 Fotos
George Clooney - To play the main role in 'Syriana' (2005), the actor put on 14 kilos, as reported by Female First.
© NL Beeld
3 / 26 Fotos
Jared Leto - CNN said that the actor had to lose between 14 to 18 kilos for his part in 'Dallas Buyers Club' (2013).
© NL Beeld
4 / 26 Fotos
Matthew McConaughey - To play the role which won him an Oscar in 'Dallas Buyers Club' (2013), the actor reportedly lost about 21 kilos, according to the BBC.
© NL Beeld
5 / 26 Fotos
Chris Hemsworth - Famous for his role as Thor, the actor had to lose roughly 14 kilos when he played James Hunt, a British racing driver, in 'Rush' (2013), according to Hollywood Life.
© BrunoPress
6 / 26 Fotos
Jake Gyllenhaal - Business Insider reported that the actor lost 14 kilos for his role in 'Nightcrawler' (2014).
© NL Beeld
7 / 26 Fotos
Jake Gyllenhaal - The actor played a boxer in 'Southpaw' (2015), and underwent intensive training in order to gain seven kilos of muscle in just six months, according to the Daily Mail.
© NL Beeld
8 / 26 Fotos
Chris Pratt - Used to play the slightly overweight Andy in the series 'Parks and Recreation,' Pratt followed an intense diet and training routine to get this body for 'Guardians of the Galaxy' (2014). According to Men's Fitness he lost about 27 kilos in six months.
© NL Beeld
9 / 26 Fotos
Jared Leto - The Hollywood Reporter said that the actor had had to put on 30 kilos for his part in the movie 'Chapter 27' (2007).
© NL Beeld
10 / 26 Fotos
Tom Hanks
- Hanks lost approximately 23 kilos when he acted in 'Cast Away' (2000), according to The Telegraph.
© NL Beeld
11 / 26 Fotos
Robert De Niro - For one of the most iconic roles of his career, the actor underwent two transformations. To play Jake La Motta, in 'Raging Bull' (1980), the actor trained for a year, just like La Motta, according to Men's Fitness.
© NL Beeld
12 / 26 Fotos
Robert De Niro - Later on in the movie, De Niro had to gain 27 kilos, according to The Telegraph, after his character underwent a complete physical transformation.
© NL Beeld
13 / 26 Fotos
Bradley Cooper - To play the part of Chris Kyle in 'American Sniper' (2014), the actor underwent training to gain seven kilos in muscle, according to Men's Health.
© NL Beeld
14 / 26 Fotos
Jason Segel - The Daily Mail reported that Segel had lost almost 16 kilos to play one of the main roles in 'The Five-Year Engagement' (2012).
© Getty Images
15 / 26 Fotos
Natalie Portman - The actress reportedly lost nine kilos for her starring role in 'Black Swan' (2010), according to E News.
© NL Beeld
16 / 26 Fotos
Margot Robbie - For the role of Tonya Harding in the movie 'I, Tonya' (2017), the actress did ice skating training for four months, according to Popsugar.
© NL Beeld
17 / 26 Fotos
Hilary Duff - The actress played Sharon Tate in an independent movie. You can see how much the production had to work to make her look like her character.
© NL Beeld
18 / 26 Fotos
Charlize Theron - According to FoodsForBetterHealth, the actress had to put on 14 kilos when she played a serial killer in the movie 'Monster' (2003).
© NL Beeld
19 / 26 Fotos
Matt Damon - 'Courage Under Fire' (1996) saw the actor lose approximately 18 kilos, according to the Daily Star.
© NL Beeld
20 / 26 Fotos
Anne Hathaway - The Daily Mail claimed that for her role as Fantine in 'Les Miserábles' (2012), the actress had to lose 11 kilos.
© Getty Images
21 / 26 Fotos
Christian Bale - To play the starring role in 'The Machinist' (2004), the actor lost 28 kilos, according to Men's Health.
© NL Beeld
22 / 26 Fotos
Russell Crowe - Shape reported that for 'Body of Lies' (2008) the actor had to put on 29 kilos.
© NL Beeld
23 / 26 Fotos
Mila Kunis - For her role in 'Black Swan' (2010), Kunis followed a strict diet to lose nine kilos, according to the Daily Mail.
© Reuters
24 / 26 Fotos
Jonah Hill
- For the role of a police officer in '21 Jump Street' (2012), the actor had to lose 14 kilos, according to an article by the NY Daily News. See also: Famous white actors who played people of color
© Getty Images
25 / 26 Fotos
© Getty Images
0 / 26 Fotos
50 Cent - According to the Daily Mail the actor lost almost 25 kilos to play the role of a young man with cancer in 'All Things Fall Apart' (2011).
© NL Beeld
1 / 26 Fotos
Hilary Swank - To play the role of a boxer in 'Million Dollar Baby' (2004), Swank underwent an intense training program to attain an athletic physique, gaining nine kilos in muscle tissue, according to Exercise Reports.
© NL Beeld
2 / 26 Fotos
George Clooney - To play the main role in 'Syriana' (2005), the actor put on 14 kilos, as reported by Female First.
© NL Beeld
3 / 26 Fotos
Jared Leto - CNN said that the actor had to lose between 14 to 18 kilos for his part in 'Dallas Buyers Club' (2013).
© NL Beeld
4 / 26 Fotos
Matthew McConaughey - To play the role which won him an Oscar in 'Dallas Buyers Club' (2013), the actor reportedly lost about 21 kilos, according to the BBC.
© NL Beeld
5 / 26 Fotos
Chris Hemsworth - Famous for his role as Thor, the actor had to lose roughly 14 kilos when he played James Hunt, a British racing driver, in 'Rush' (2013), according to Hollywood Life.
© BrunoPress
6 / 26 Fotos
Jake Gyllenhaal - Business Insider reported that the actor lost 14 kilos for his role in 'Nightcrawler' (2014).
© NL Beeld
7 / 26 Fotos
Jake Gyllenhaal - The actor played a boxer in 'Southpaw' (2015), and underwent intensive training in order to gain seven kilos of muscle in just six months, according to the Daily Mail.
© NL Beeld
8 / 26 Fotos
Chris Pratt - Used to play the slightly overweight Andy in the series 'Parks and Recreation,' Pratt followed an intense diet and training routine to get this body for 'Guardians of the Galaxy' (2014). According to Men's Fitness he lost about 27 kilos in six months.
© NL Beeld
9 / 26 Fotos
Jared Leto - The Hollywood Reporter said that the actor had had to put on 30 kilos for his part in the movie 'Chapter 27' (2007).
© NL Beeld
10 / 26 Fotos
Tom Hanks
- Hanks lost approximately 23 kilos when he acted in 'Cast Away' (2000), according to The Telegraph.
© NL Beeld
11 / 26 Fotos
Robert De Niro - For one of the most iconic roles of his career, the actor underwent two transformations. To play Jake La Motta, in 'Raging Bull' (1980), the actor trained for a year, just like La Motta, according to Men's Fitness.
© NL Beeld
12 / 26 Fotos
Robert De Niro - Later on in the movie, De Niro had to gain 27 kilos, according to The Telegraph, after his character underwent a complete physical transformation.
© NL Beeld
13 / 26 Fotos
Bradley Cooper - To play the part of Chris Kyle in 'American Sniper' (2014), the actor underwent training to gain seven kilos in muscle, according to Men's Health.
© NL Beeld
14 / 26 Fotos
Jason Segel - The Daily Mail reported that Segel had lost almost 16 kilos to play one of the main roles in 'The Five-Year Engagement' (2012).
© Getty Images
15 / 26 Fotos
Natalie Portman - The actress reportedly lost nine kilos for her starring role in 'Black Swan' (2010), according to E News.
© NL Beeld
16 / 26 Fotos
Margot Robbie - For the role of Tonya Harding in the movie 'I, Tonya' (2017), the actress did ice skating training for four months, according to Popsugar.
© NL Beeld
17 / 26 Fotos
Hilary Duff - The actress played Sharon Tate in an independent movie. You can see how much the production had to work to make her look like her character.
© NL Beeld
18 / 26 Fotos
Charlize Theron - According to FoodsForBetterHealth, the actress had to put on 14 kilos when she played a serial killer in the movie 'Monster' (2003).
© NL Beeld
19 / 26 Fotos
Matt Damon - 'Courage Under Fire' (1996) saw the actor lose approximately 18 kilos, according to the Daily Star.
© NL Beeld
20 / 26 Fotos
Anne Hathaway - The Daily Mail claimed that for her role as Fantine in 'Les Miserábles' (2012), the actress had to lose 11 kilos.
© Getty Images
21 / 26 Fotos
Christian Bale - To play the starring role in 'The Machinist' (2004), the actor lost 28 kilos, according to Men's Health.
© NL Beeld
22 / 26 Fotos
Russell Crowe - Shape reported that for 'Body of Lies' (2008) the actor had to put on 29 kilos.
© NL Beeld
23 / 26 Fotos
Mila Kunis - For her role in 'Black Swan' (2010), Kunis followed a strict diet to lose nine kilos, according to the Daily Mail.
© Reuters
24 / 26 Fotos
Jonah Hill
- For the role of a police officer in '21 Jump Street' (2012), the actor had to lose 14 kilos, according to an article by the NY Daily News. See also: Famous white actors who played people of color
© Getty Images
25 / 26 Fotos
George Clooney and other actors who totally transformed their bodies for a movie
The actor was hospitalized after dropping nearly 28 lbs
© <p>Getty Images</p>
To get some movie parts, not only do you need to have talent and the ability to get into character, but you've also got to have a will strong enough to completely immerse yourself in your role—even if that means making impressive physical changes.
For his latest film, 'The Midnight Sky,' George Clooney shed nearly 28 lbs (13 kg) to play the role of an astronomer who survives an apocalyptic event, The Mirror reports. But, despite his awesome dedication, losing the weight so fast meant he compromised his health, and four days before he was due on set, he was rushed to the hospital with stomach pains, eventually diagnosed as pancreatitis. He was forced to spend weeks recovering, and as the director of the film as well, it was "not so easy because you need energy, " he told the tabloid. "But it certainly helped with the character.” Clooney also had to grow a big grey beard for the role, which was reportedly not fun for his wife Amal either.
There are numerous cases in Hollywood where actors had to gain or lose weight while filming. Check out the gallery to see which stars had to undergo drastic changes for movie roles!
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