Thirty Seconds to Mars frontman Jared Leto returns to the big screen this fall with his role in the upcoming film "Dallas Buyers Club."


The movie, which premiered at the Toronto International Film Festival this week, stars Leto alongside Matthew McConaughey, as Rayon, a transsexual woman who is HIV-positive.


Leto underwent a dramatic transformation for the role, losing more then 30 pounds for the shooting of "Dallas Buyers Club." He opened up to The Wrap about his weight loss at TIFF this week, explaining, "I stopped eating.”


"It was 30 or 40 pounds," Leto continued. "After a while I stopped counting. It changes the way you walk, the way you sit, the way you think."


This isn't the first time that Leto has spoken about his "Dallas Buyers Club" dieting. "Your body goes through weird stages," Leto told Vulture late last year. "Sometimes it's hard to hold on to water. But for me, it's not about the most weight I can lose, it's more to represent the character. I'm focused on what it means to be a transsexual woman."


For more on Leto, head over to The Wrap.



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  • Curtis "50 Cent" Jackson


    <strong>Movie:</strong> "All Things Fall Apart" (2011) <strong>Role:</strong> Deon, a celebrated football player battling cancer <strong>Weight loss:</strong> <a href="http://www.huffingtonpost.com/2010/05/28/50-cents-weight-loss-deta_n_593953.html" target="_blank">More than 50 pounds</a>




  • Christian Bale


    <strong>Movie:</strong> "The Fighter" (2011) <strong>Role:</strong> Professional boxer Dicky Eklund, who suffered from a crack addiction <strong>Weight loss:</strong> "I never got on a scale. I didn't want it to be about the numbers; I wanted it to be about the look," Bale <a href="http://watch.accesshollywood.com/video/christian-bale-exposes-dramatic-weight-loss-details-for-the-fighter/1314801535001?utm_source=accesshollywood.com&utm_medium=referral" target="_blank">told "Access Hollywood."</a>




  • Christian Bale


    <strong>Movie:</strong> "The Machinist" (2004) <strong>Role:</strong> A machinist with intense insomnia <strong>Weight loss:</strong> 63 pounds. "I had what could be called a kind of stupid feeling of invincibility, like, 'Oh I can do it. I can manage it,'" <a href="http://voices.yahoo.com/christian-bales-weight-loss-machinist-this-66659.html" target="_blank">Bale said</a>.




  • Collin Farrell


    <strong>Movie:</strong> "Triage" (2011) <strong>Role:</strong> A photojournalist with PTSD <strong>Weight loss:</strong> 44 pounds, thanks to a diet of only tuna, coffee and diet soda




  • Matt Damon


    <strong>Movie:</strong> "Courage Under Fire" (1996) <strong>Role:</strong> An Army medic who goes AWOL <strong>Weight loss:</strong> 40 pounds, which was reportedly shed via daily running and a diet of chicken breast, egg whites and one plain baked potato per day along with large amounts of coffee and cigarettes




  • Matthew Fox


    <strong>Movie:</strong> "Alex Cross" (2012) <strong>Role:</strong> Picasso, a professional assassin who participates in an underground ultimate-fighting ring <strong>Weight loss:</strong> "It was circuit training until I wanted to puke," <a href="http://www.mensfitness.com/leisure/entertainment/matthew-fox-uncensored-the-alex-cross-star-talks-about-career-and-controversy" target="_blank">Fox said</a> of the 40 pounds he shed to play the chronically fit serial killer.




  • Matthew McConaughey


    <strong>Movie:</strong> "Dallas Buyers Club" (2013) <strong>Role:</strong> Ron Woodruff, a Texas rodeo cowboy who is diagnosed with HIV and given 30 days to live <strong>Weight loss:</strong> Nearly 40 pounds, eliminated by <a href="http://www.eonline.com/news/365424/skinny-matthew-mcconaughey-dishes-on-his-shocking-weight-loss" target="_blank">cardio and diet</a>




  • Michael Fassbender


    <strong>Movie:</strong> "Hunger" (2008) <strong>Role:</strong> Bobby Sands, who led a Provisional Irish Republican Army hunger strike in 1981 <strong>Weight loss:</strong> 42 pounds after adopting <a href="http://www.contactmusic.com/news/michael-fassbender-recalls-weight-loss-horror_1223716" target="_blank">a diet of 600 calories a day</a>, heavy on nuts and berries




  • Seth Rogen


    <strong>Movie:</strong> "The Green Hornet" (2011) <strong>Role:</strong> Britt Reid/The Green Hornet <strong>Weight loss:</strong> 40 pounds with the help of a personal trainer




  • Tom Hanks


    <strong>Movie:</strong> "Philadelphia" (1993) <strong>Role:</strong> Andrew Beckett, a lawyer dying of AIDS <strong>Weight loss:</strong> Nearly 30 pounds




  • Tom Hanks


    <strong>Movie:</strong> "Cast Away" (2000) <strong>Role:</strong> Chuck Noland, a systems analyst whose airplane crashes and strands him alone in the Pacific Ocean <strong>Weight loss:</strong> Hanks gained 50 pounds to portray the pudgy Chuck and then <a href="http://www.ew.com/ew/article/0,,20272551,00.html" target="_blank">had to shed the weight</a> to depict his growing state of emaciation while stranded.