As part of a plea deal, Charlie Sheen is expected to plead guilty to misdemeanor assault on Monday in exchange for more serious charges against him being dropped.

But the big question is: will the Two And A Half Men star be required to serve any time behind bars? We'll find out Monday when Sheen appears in an Aspen, Colorado courtroom for a hearing at 4pm MST.

Sheen's attorney Yale Galanter says the star will plead guilty to  second degree assault in exchange for more serious charges - felony menacing and criminal mischief - being dropped in connection with the Christmas Day 2009 incident during which he allegedly pulled a knife on his estranged wife Brooke Mueller.