If you haven’t heard yet, Demi Moore’s husband will being replacing Charlie Sheen on the CBS hit comedy Two and a Half Men.

You may not have heard this either, but Charlie Sheen has been having some…issues.

And because of those issues, he was fired from his gig as America’s most popular slacker on the hit TV show.  People have wondered if the show will be able to go on without him, and apparently CBS will give it a try.  Because no matter what you think about Ashton Kutcher, the man has name recognition.

Oh, and about 6.6 million followers on Twitter.

He and his wife Demi Moore are two of the biggest Twitter stars in the world, as they were two of the first celebrities to embrace the social media platform during its early stages.

Last night, Ashton tweeted this cheeky little question (hint for the math challenged : the answer is 2.5)

Charlie Sheen has been silent on the new on Twitter, but has sounded off elsewhere, according to TMZ.

Charlie tells TMZ, “Kutcher is a sweetheart and a brilliant comedic performer … Oh wait, so am I!!”

Charlie adds, “Enjoy planet Chuck, Ashton. There is no air, laughter, loyalty, or love there.” Of course, Charlie is referring to his nemesis, “Men” creator and Executive Producer Chuck Lorre

The Twitter world has blown up about the casting news. Ashton Kutcher is a trending topic, and many Twitter heavyweights have dropped their two cents. Check out some of the best: