One.

That's no longer just the number of unfunny Two and a Half Men quotes uttered on that terrible sitcom every five minutes.

It's also the number of felony charges Charlie Sheen now faces.

The actor will be charged with a count of felony menacing in association with his alleged Christmas Day assault against Brooke Mueller, according to Colorado police

For reportedly holding a knife against Mueller's knife neck and threatening to kill her, Sheen will also face a charge of misdemeanor assault.

Look for the actor to be arrainged on Monday. He's not expected to enter a plea, but Brooke and Charlie will ask the judge to relax the protective order against him.