Charlie Sheen's dad, Martin Sheen, already guest-starred on the CBS sitcom, and now Charlie's brother, Emilio Estevez, is getting his turn!

"My dad did the show a couple of years ago," Charlie said, "So it was only a matter of time until someone of my brother's talent could also come and play in our sandbox."

But Emilio won't be playing Charlie and Alan's bro (despite the family resemblance); he'll be playing one of Charlie's old drinking buddies.

Sounds fun, but the real question is, will Emilio be doing his dance from The Breakfast Club? 'Cause I can't ever get enought of that.