Jared Leto's 'Dallas Buyers Club' Role Prompted Him To Lose '30 Or 40 Pounds'

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.