Carey_sheenWe knew back in January that Charlie Sheen had joined in the fun during a taping of Drew Carey's Improv-A-Ganza for GSN in Las Vegas.

Right after it happened, Carey himself mentioned it on Twitter, letting everybody know about it: "Charlie Sheen just got on stage with us during our improv show at MGM in Vegas. Hilarious!"

Carey then followed that up hours later with another comment:

DrewCarey_twitter
This was barely 10 days before Sheen's partying landed him in the hospital, thereby setting this highly over-publicized trainwreck into motion that put a temporary and perhaps permanent halt to the top-ranked CBS sitcom (and top-ranked show in syndicated reruns, too), Two and a Half Men.

And now Sheen is billing himself as a live comedy act, going on a limited tour and even selling out venues as large as New York City's Radio City Music Hall.

Sheen_improvBut back to that night in January.

One of the other comedians improvising onstage with Sheen was his castmate on Two and a Half Men, Ryan Stiles. Stiles plays the "half man's" stepfather, Dr. Herb Melnick, and has been a recurring character since the sitcom's second season. During a conference call this afternoon, Stiles weighed in on Sheen's improv performance, which will air April 12, 2011, in the premiere week of Drew Carey's Improv-A-Ganza on GSN.

Stiles said: "It was great. We weren't even sure if he was going to come up. He was sitting in the audience. But we asked him to do a scene. Usually when we ask actors like that, they're like, 'Oh, I don't think so." Sheen was game, though. And Stiles said he enjoyed the whole taping.

"You could hear him in the crowd. He laughed at everything. Even the stuff that wasn't funny."

As for Sheen as a comedic improviser? Stiles quipped:

"I think he carried himself well. And I'm not saying that because I have to go back to Two and a Half Men, because I don't."

The cast of Drew Carey's Improv-A-Ganza includes: Carey, Heather Anne Campbell, Jeff Davis, Chip Esten, Kathy Kinney, Jonathan Mangum, Sean Masterson, Mochrie, Proops, Brad Sherwood and Stiles, with special guest appearances by Wayne Brady.