Hugh Jackman a Whore for Charity

Hugh Jackman is auctioning off the chance to bulk up with him at the gym for a cool $20K.

Jackman is in the process of adding 20 pounds to his already muscular frame for the sequel to Wolverine. The money raised will benefit New York City's Summit School for children with learning and adjustment challenges.

"If someone comes in and says, 'I want to try it exactly how you train. I want to just go as hard as we can,' we'll go there," Jackman told E! Online's Marc Malkin. "But I don't want people to feel intimidated if they want to come experience it but not keel over. Put it this way, if you want to throw up, there's every opportunity," he added. "But if you want to come and have a light sweat -- want to have a bit of fun, maybe an autograph or two -- you can do that as well."

The actor also said that for an extra $5K, he'll work out shirtless.

"Sure. No problem. You know me, I'm a whore. I think I was shirtless for the whole time in my first movie in Australia, and I think I only made about $4,000."