Chad Michael Murray is one dedicated actor, the star recently chose to go on an extreme diet to lose weight for an upcoming role.

During a roundtable interview for his current film "Cavemen" on Wednesday, February 5th, Nicky Whelan's boyfriend talked about his dramatic weight loss.

According to Us Weekly, the 32-year-old said, "I played a homeless heroin addict for a film called 'Other People's Children,'" adding, "I lost 25 pounds for it, and I was really in a dark place for about a month. It was taking your work home with you. It's heavy."

The former "One Tree Hill" star showed up to the Hollywood premiere of the film which he promoted on Twitter, looking noticeably thinner in a black leather jacket and slim pants. While acknowledging his weight loss he explained that he shed the pounds in a healthy way.

He said, "I wanted to do it organically in a healthy way, I really did. I didn't want to just cut down to water and crackers," adding, "Every day I didn't consume anything that wasn't from God's green earth.

"Pretty much oatmeal, egg whites, salads, chicken, tuna -- that's pretty much it. You find ways to dress it up and make it wonderful. After a week, you can't tell the difference. You actually look forward to egg whites -- can't wait."

The heartthrob went on to describe his daily routine. He said, "I'd have some oatmeal and do an hour and a half of circuit training and weights," adding, "Come home and have a really healthy lunch like egg whites and a banana. Continue on, have some coffee, and do a five-mile jog at night."

Chad Michael Murray admitted, "If you eat really clean, your calorie intake is only 1,400, 1,500, 1,600 calories. But I was burning 3,000 a day with just the training alone. I did that for three and a half weeks and just dropped right off."

He continued, "I just like testing myself. I like having a test and saying, 'Will power, can you beat this.' It's not forever. I just have to eat that way for three and a half weeks. Film is forever."

However, now that the film has wrapped the actor is having trouble putting weight back on. He confessed, "That's the hard thing. I'm struggling to put it back on."

He went on to say, "I haven't been able to train much for the past seven months because I've been working back to back."

Check out the PHOTO and let us know what you think of Chad Michael Murray's weight loss in the comment section below.