"Forget being a babies' room. If I had a room like that growing up at any point, I would have been over the moon," Sheen, 43, told PEOPLE on Tuesday at Las Vegas's MAGIC convention, where he unveiled his new DaVinci Collection by Charlie Sheen clothing line.
The couple hope to put the finishing touches on the nursery this week.
"We have a deadline," said Sheen. "It's that last-minute push with the paint, furniture and all the accessorizing and all that, but it's going to be lovely."
Wife HospitalizedWhile Sheen was in Vegas on behalf of his clothing line Tuesday, his wife checked into a hospital in Los Angeles after experiencing premature contractions. He later joined her at the hospital.
The couple will celebrate the impending birth this weekend with a baby shower for Brooke, 31, and plan to donate many of their gifts to charity.
"I am invited," Sheen says of the shower. "Apparently, I don't have to do anything, just show up and collect gifts. But there will be more stuff that goes to charity. People that don't need it get the most stuff, and that's what's wrong with the world."
New Clothing LineSheen's clothing line features 1950s, short-sleeved rockabilly-inspired shirts similar to the styles he wears on his CBS sitcom Two and a Half Men.
"I'm not a rocker, per se. I don't play any instruments, but rock is really all I listen to," he says.
It's the second time the actor has lent his name to a clothing line. Three years ago, he launched the now-defunct Sheen Kidz sportswear line. But the designs are still being worn by Sam, 4, and Lola, 3, his daughters with ex-wife Denise Richards (Sheen is also dad to Cassandra, 24, from a previous relationship).
"I have clothes for them for the next six or eight years until they grow out of them," he says.
2007: Charlie proposes to Brooke in Costa Rica