Christian Bale
To say that Christian Bale has range as an actor might be an understatement.
Christian Bale
For his role in 'The Machinist', Bale lost an incredible 62 lbs!
Christian Bale
Six months after finishing 'The Machinist", Bale had gained roughly 100 lbs to play Batman in 'Batman Begins'.
Christian Bale
For 'American Hustle' Bale gained an additional 40 lbs.
Jared Leto
Jared Leto is known to go to great lengths to get ready for a role.
Jared Leto
For his role as a transgender woman battling AIDS in 'Dallas Buyers Club' Leto waxed his entire body and lost 30 lbs.
Jared Leto
Before that, Leto packed on almost 70lbs for his role as Mark David Chapman in 'Chapter 27'.
Chris Hemsworth
Hemsworth hasn't always had the physique of a Norse god.
Chris Hemsworth
But for his role as Thor, the Aussie bulked up with 20lbs of muscle.
Chris Hemsworth
Playing a whaler, Hemsworth had to lean up and then as a marooned whaler he had to lose even more weight, around 40lbs all together for the role.
Jake Gyllenhaal
Jake Gyllenhal is another actor willing to do what needs to be done for a role.
Jake Gyllenhaal
Jake ate nothing but kale salads and ran 10 miles a day in order to lose 30lbs for his role in 'Nightcrawler'.
Jake Gyllenhaal
After 'Nightcrawler' Gyllenhall trained for five months and packed on lean muscle for his role as a boxer in 'Southpaw'.
JK Simmons
The Oscar-winning actor is no stranger to Hollywood's rigors.
JK Simmons
But at 61, SImmons is looking huge for his role as Commissioner Gordon in 'Justice League'.
Chris Pratt
Chris Pratt is a comedic actor and now a bonafide action star.
Chris Pratt
As Andy Dwyer, Pratt's weight climbed to over 270lbs.
Chris Pratt
But when he was cast as Starlord in 'Guardians of the Galaxy', Pratt got in great shape and dropped to around 225lbs.
Rooney Mara
Rooney's breakthrough role in Hollywood was 'The Girl With The Dragon Tattoo'.
Rooney Mara
For the role of Lisbeth Salander, Rooney lost weight, bleached her eyebrows and got multiple piercings.
Tom Hardy
Tom Hardy is another actor known for going to great lengths for a movie role.
Tom Hardy
For his role as Charles Bronson, Hardy put on about 40lbs.
Tom Hardy
Hardy went through MMA training and leaned up for his role in 'Warrior'.
Tom Hardy
Then Hardy bulked up again with 30lbs to play Bane in 'The Dark Knight Rises'.
Matt Damon
Matt Damon is one of the biggest stars on the planet.
Matt Damon
To play a drug-addicted solider in 'Courage Under Fire' Damon lost 40lbs.
Matt Damon
For Damon's role in
'The Informant!' he gained substantial weight.
Matt Damon
As a super-agent skilled in everything, Damon got in incredible shape to play Jason Bourne multiple times.
Natalie Portman
Natalie Portman is an extremely talented and intelligent actress.
Natalie Portman
For Portman's role as a ballerina in 'Black Swan' she trained for months as a dancer and lost 20lbs off her already tiny frame.
Matthew McConaughey
Matthew Mcconaughey has always been in good shape.
Matthew McConaughey
For his role as a former rodeo cowboy who battled AIDS, McConaughey lost 50lbs!
Matthew McConaughey
He got back to his lean athletic build for the male stripper-centric 'Magic Mike'.
50 Cent
Rapper, producer and actor Curtis Jackson has always had an imposing physique.
50 Cent
That's why is was so shocking when he dropped over 50lbs to play a football player battling cancer.
Charlize Theron
Charlize is one of the most recognizable actors in Hollywood.
Charlize Theron
But when she was the star of the movie 'Monster' she was almost unrecognizable after gaining 30lbs for the role.
Adrien Brody
Brody is an Academy-Award-winning actor.
Adrien Brody
The movie for which he won the Oscar for Best Actor, 'The Pianist' Brody lost 30lbs.
Adrien Brody
For his role in 'Predators', Brody put on 25lbs of muscle.
Tom Hanks
Tom Hanks has bad luck in movies dealing with planes.
Tom Hanks
Case in point in 'Cast Away" Hanks' character survives on a tropical island after his plane crashes. He gained 50lbs prior to the role and then lost all of that a more for the movie.
Hugh Jackman
Hugh Jackman has become quite the household name.
Hugh Jackman
Since first portraying Wolverine in the first X-Men movie, Jackman gained an incredible amount of muscle mass for his subsequent appearances.
Hugh Jackman
To play Jean Valjean, Jackman lost 15lbs and allowed himself to become severely dehydrated for the opening sequences of the film and later gained an additional 30lbs for the later sequences.
Hillary Swank
HIllary is an Academy-Award-winning actress.
Hillary Swank
For 'Boys Don't Cry' Swank lived as a man for over a month prior to shooting, cut her hair and reduced her body fat to 7%!
Hillary Swank
Swank underwent extensive boxing and weight training and gained almost 20lbs of muscle for her role in 'Million Dollar Baby'.
Renee Zellweger
Renee Zellweger is an Academy-Award-winning actress.
Renee Zellweger
And when she was cast to star in 'Bridget Jones' Diary', Zellweger gained over 20lbs for the role.
Gerard Butler
The Scottish actor has been making movies since the late 1990s.
Gerard Butler
And when he was cast as King Leonidas in '300', Butler, along with the rest of the cast underwent extensive training to get in peak condition.
Anne Hathaway
Anne Hathaway is an Academy-Award-winning actress who has taken on a myriad of roles in her career.
Anne Hathaway
But for her role as Fantine in 'Les Miserables' she lost a considerable amount of weight and had her head sheared for the role.
Edward Norton
Edward Norton is a superb actor who has played all kinds of roles in his career.
Edward Norton
To play his neo-nazi character in 'American History X' Norton bulked up considerably.
Eric Bana
The Aussie actor and comedian has played many varied roles in his career.
Eric Bana
To play Hector of Troy, Bana got seriously ripped.
Eric Bana
Bana gained 30lbs and shaved his head to play the Australian criminal, Chopper Read.
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You won’t believe what these stars did to get the role.
