The former `Two and a Half Men` star - who has been discovered in a hotel room with a prostitute, wielded a machete of the top of a building and had two live-in girlfriends in the last year - is now a in a "mellower" state, but does not know exactly how long he has been free of drink and drugs.
Asked if he was sober by `The Today Show`s Matt Lauer, Charlie said: "Absolutely. I don`t really keep track of the time. It`s been a while.
Things are a lot calmer. It`s a lot mellower."
However, he admits he is unsure of how is state of mind came about, and found the time "pretty exciting" as he didn`t know what he was going to do next.
He said: "I really don`t 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.
"From one moment to the next, I didn`t know what was going to happen. It was pretty exciting." At one point Charlie became famous for drinking a mysterious concoction known as Tiger Blood, and that period is one he admits is "silly".
He added: "Looking back on it, I don`t think I would trade it, but there are portions of it I would have amended a little bit. I don`t know, the Tiger Blood thing, it was so silly and people took it so seriously and I figured, alright, I`ll continue to give the people what they want, you know?"