The celebrity lineup for the second TwitChange Auction is set, the charity has been chosen, and tweeters everywhere sit at the ready, fingers poised over their keyboards. Soon, Twitter users will be able to bid for the opportunity to be followed, retweeted, or mentioned on Twitter by one of the celebs participating in the auction.

The TwitChange Auction started last year and was a huge success, raising over $500,000 to build a special needs school in Haiti through ahomeinhaiti.org. Now, four months later, the second auction will be raising money for Operation Once in a Lifetime, a charity that “provides moral and financial support for U.S. troops, veterans, and their families.”

The lineup of participating celebrities is a long one, and ranges from athletes (Troy Polamalu, Shaq, Jonathan Stewart) to comedians (Jim Gaffigan, Sinbad) to musicians (Sara Bareilles, Reba McEntire), and of course plenty of actors (Seth Green, Eliza Dushku, and Harry Potter‘s Tom Felton). Eva Longoria participated in the last auction as well, and has been a big supporter of the events.

So if you’ve ever wanted eco-celeb Alyssa Milano to follow you, or an NFL running back to retweet you, or Kim Kardashian to mention you in one of her $10,000 tweets, now is your chance! Check out the TwitChange website to learn more, see the full list of celebs, and place your bid!