Well, that was unexpected: Charlie Sheen played it straight, and played nice, at Sunday's Primetime Emmy Awards in L.A.

Presenting the trophy for Outstanding Actor in a Comedy Series, the 46-year-old actor (who wasn't nominated this year) was low-key and contrite as he approached the podium.

"I want to take a moment to get something off my chest ad say a few words to everybody here from Two and a Half Men," Sheen said as the crowd chuckled nervously.

Earlier this year, the hard-partying star was notoriously fired from the smash CBS sitcom due to his incendiary comments against the show's creator and a string of bizarre, troubling incidents.

"From the bottom of my heart," Sheen said to his former colleagues Sunday. (Ashton Kutcher joined the cast after Sheen's departure.) "I wish you nothing but the best for this upcoming season. We spent 8 wonderful years together, and I know you will continue to make great television."

Accepting his Emmy from Sheen, Best Actor winner Jim Parsons of the Big Bang Theory quipped of his win: "This is so odd for so many reasons!"

In an interview with Matt Lauer on the Today Show last week, Sheen said that he's "absolutely" sober -- and that he is emotionally "a lot calmer" and "mellower" these days.

What was his deal during those wild days?  "I don't really know what happened. It was one of those things where the planets were aligned, perfectly or imperfectly. I said some stuff and then it caught such traction globally and instantly that I couldn't really put out the fire."