10/26/2008 at 01:00 PM EDT
Charlie Sheen is "thrilled" to be entering uncommon ground: raising boys.
The actor confirmed to PEOPLE that he and wife, Brooke, are indeed expecting twin boys
"We know it's boys and it's pretty cool. We're thrilled," he said at Planet Hollywood's Prive Las Vegas on Saturday.
As far as raising them, Sheen – who has daughters Sam, 4, and Lola, 3, with ex-wife Denise Richards, and 23-year-old Cassandra from his relationship with ex-girlfriend Paula Profitt – admits he doesn't quite know what to expect.
"It's going to be extremely different. I don't know how to deal with boys," he said. "But I didn't know how to deal with girls when I had them either, so I guess it's all an education."
The couple had a feeling
they would be adding a little testosterone to their nest in August, with Brooke saying that "the odds are it's a boy" and Charlie joking that they would be having a boy unless he was batting "100 percent".
"I just want them to be healthy," Charlie said at the time. "That's all I ask."