Charlie Sheen 'Ready & Able' to rejoin 'Two and a Half Men'

Given the opportunity, Charlie Sheen would happily reunite with his old mates. Or maybe not.

The former "Two and a Half Men" star was posed a question on Twitter about rejoining the show should his replacement, Ashton Kutcher, get booted for his ill-conceived Tweet about Penn State football coach Joe Paterno.

"[Kutcher's] tweet about Paterno. @CharlieSheen...might get your old job back!" writes Eric Stangel, the head writer of the "Late Show with David Letterman."

Sheen, who appears to miss his old gig, responds, "Ready & Able." After pondering the matter for moment, Sheen reconsiders. "Hmm....? Not Likely!" he says.

Kutcher took a lot of flack last week after he chastised Penn State for firing head football coach Joe Paterno. Kutcher hadn't done his homework on the matter as Paterno was sacked for possible involvement in a covering up child sex abuse at the university.

Sheen left the CBS comedy after a public blowout with the show's EP Chuck Lorre.