By Breaking Celebrity News Staff

Famous for putting their wallets where their mouths are, celebrities including Katy Perry and Brad Pitt have donated their personal belongings and talents to a new charity launched by eBay, Breaking Celebrity News has learned.

eBay.com/Celebrity is uniting fans with their idols' favorite causes through celebrity charity auctions where they can bid on coveted items or attend events that bring them face-to-face with the stars.

Some of the initial opportunities on the auction block are a meet and greet with Brad Pitt to benefit Make It Right, a red sequined dress worn by Katy Perry supporting the American Red Cross, and a private acting workshop with Robert Duvall supporting the Robert Duvall Children's Fund.

Other celebrities taking part in the good cause include Christina Aguilera, Jeff Bridges, Jimmie Johnson,  Sienna Miller, Hayden Panettiere, Troy Polamalu, and Joe Walsh.