Robert Pattinson-signed guitar!!!

The Twilight Saga: New Moon, The Twilight Saga: Eclipse, and Remember Me star Robert Pattinson, like many of his castmates, is stepping up for charity.

He recently put his signature on a guitar, and it's being auctioned on eBay to help raise money for the homeless.

The charity of choice is The Midnight Mission, an organization which states that its mission is as follows: "We provide an array of life changing sevices for homeless men, women and children. They include education, job training and placement, drug and alcohol treatment and referral services. Additionally, we provide basic subsistence services and transitional housing for families."

According to the listing (on eBay) "Rob happened to be shopping for instruments at Norm's Rare Guitars and Norm (a great friend of The Midnight Mission), asked him if he'd sign a guitar that could be auctioned off to support the services of the charity. Rob was gracious enough to say yes and do it. This terrifically talented actor and singer/musician even consented to have his picture taken with the signed instrument. I didn't post it here, but have it available for authentication (believe it or not this humble actor is a bit camera shy when not at work)."