Sam Claflin plays a paralyzed banker in his new film "Me Before You," but he was far from immobile in preparing for the role.

The actor said he shed 42 pounds to get ready for the role. In the film, his character, Will, has a shirtless scene in which he needed to be incredibly toned for.

49/50 final thought I had to get myself in peak physical condition to play Will before the accident, and that came along with at least one long and hard daily session in the gym and a very strict diet, with little sleep. It was important for me to show the distinct differences between him before and after the accident, not only emotionally and mentally, but physically too. I shed over 3 stone in the three months I was training, and honestly pushed my personal limits. A lot of people struggle with every day life, and do it alone, I was fortunate to have a wonderful support network around me, guiding me through the process step by step. I'm not saying I'm a hero. I'm merely saying I found it tough and therefore appreciate what other people go through. I'm an actor. I do what I can to make each part I play as believable as I can. To play it honestly. And truthfully. And hope people invest within that character. The two sides of Will, are of course just one person, but I believe we are all made up of many different versions of ourselves. A lot of us haven't been tested the way Will has, but something as life-changing as that, will affect people differently. Every person is different. Everyone deals with circumstance and situation differently. And everyone should be able to make choices in life without judgement or comment. This film is Wills journey. Enjoy your journey. #liveboldly #50daycountdown #willtraynor @mebeforeyouofficial

A photo posted by Sam Claflin (@mrsamclaflin) on

"I had to get myself in peak physical condition to play Will before the accident, and that came along with at least one long and hard daily session in the gym and a very strict diet, with little sleep," Sam said on Instagram on Friday, showing a snap of his ripped and fit body.

"It was important for me to show the distinct differences between him before and after the accident, not only emotionally and mentally, but physically too," he said. "I shed over 3 stone in the three months I was training, and honestly pushed my personal limits."

One stone is equivalent to 14 pounds.

"A lot of people struggle with every day life, and do it alone, I was fortunate to have a wonderful support network around me, guiding me through the process step by step," he said. "I'm not saying I'm a hero. I'm merely saying I found it tough and therefore appreciate what other people go through."

The film was finally released on June 3 after tremendous build up. For the past 50 days, Sam has been posting an image a day as countdown, many of them from behind the scenes of the film with costar Emilia Clark.

"I'm an actor," he said in his shirtless post. "I do what I can to make each part I play as believable as I can. To play it honestly. And truthfully. And hope people invest within that character."

He continues on about his character, "The two sides of Will, are of course just one person, but I believe we are all made up of many different versions of ourselves. A lot of us haven't been tested the way Will has, but something as life-changing as that, will affect people differently. Every person is different. Everyone deals with circumstance and situation differently. And everyone should be able to make choices in life without judgement or comment.

This film is Wills journey. Enjoy your journey. #liveboldly."