Matthew McConaughey isn't the only Hollywood hunk who is good at starving!

Jared Leto dropped a dramatic amount of weight to play a transexual in the upcoming film "Dallas Buyer's Club," and now he's showing off his emaciated body by posing for photographer pal Terry Richardson.

The actor is wasting away, and it's all thanks to fasting! The My So Called Life star revealed he hasn't eaten a thing in almost a month!

We can't believe he has the energy to do anything with no food for fuel!

To complete his transformation, the 40-year-old shaved his eyebrows off, presumably to draw ones on and appear more feminine.

Yikes!

Kurt Cobain passed away 17 years ago, and now 30 Seconds To Mars lead singer Jared Leto is remembering the Nirvana frontman with an incredible performance.

Leto, who performs songs "Pennyroyal Tea" and "Rape Me," posted this tribute video on his personal blog, and we can't believe how much he looks and sounds like Cobain. The sexy actor nails it!

Jared wrote the following on his blog yesterday:

"I heard today (April 5) was the day Kurt passed away 17 years ago. Can’t believe it’s been that long. So grateful for his contribution and inspiration. Not sure I’d be doing this if it weren’t for him."

At one time, the 39-year-old actor was reportedly in talks to play Cobain in a biopic of the star. Find out what else Leto wrote on his blog about this video tribute ... after the jump.

Our only argument against it? The goofy pink hat covers up his hotness! Check out actor turned rocker Jared Leto eating at Toast in La La Land yesterday afternoon. Let's hope he had a big meal because dude is looking a little on the lean side...

Courtesy: Ed Graff/Palms Casino Resort

Jared Leto and his band 30 Seconds to Mars rocked the house on New Year's Eve at the Palms Casino Resort in Las Vegas.

The 39-year-old sexy lead singer, who stayed in a one-bedroom suite at Palms Place Hotel & Spa, gave the sold-out crowd at the Pearl Concert Theater a night they won't soon forget!

Leto, sporting bleached blonde locks and aviator shades, never disappoints when on stage. 30 Seconds To Mars, who won "Best Rock Video" for their single Kings & Queens at the 2010 MTV Video Music Awards, has sold more than three million albums to date.

Rock on!

Jared Leto is one stylish guy! The 39-year-old frontman of 30 Seconds To Mars rocked a black fur hat while hitting up Barneys in Beverly Hills, and those sexy blue eyes are mesmerizing.

Leto's band is scheduled to perform on New Year's Eve inside the Pearl Theater at the Palms in Las Vegas.

30 Seconds To Mars has sold over $3 million albums to date. We bet having a cute lead singer helps!

courtesy MrPaparazzi

30 Seconds To Mars and Enter Shikari performed at the O2 Arena in London last night, and after the concert we snapped a very blue Jared Leto heading to an afterparty. Any takers for the Cookie Monster look? At least we know he's hiding a hot body under there!

image courtesy of Jared's Twitter

Jared Leto posted this shirtless shot of himself on Twitter the other day, and captioned it, "Real Men Wear Skirts." Yes Jared, because the skirt is the main thing we're looking at in this photo...

Image courtesy of Andrew Tapper / kiwipaparazzi.blogspot.com

Jared Leto was spotted arriving at the ASB Showgrounds in Auckland, New Zealand to do press for his band's new album, and while we miss seeing him onscreen with a more natural hair color, we still wouldn't kick him off our doorstep!