Kendra Wilkinson: I'm Due on Christmas!

Kendra Wilkinson will have an extra gift this holiday season: her first baby.

"I'm 12 weeks along," the reality star tells E!. "And my doctor told me I'm due on Christmas Day! We were actually trying to plan a June baby next year, but we're so happy that it's Christmas. The baby is going to be spoiled with a lot more gifts."

See Hef and the girls' wildest moments in the Playboy mansion.

Wilkinson and her fiance, NFL star Hank Baskett, found out they were expecting while on a layover at the airport in Amarillo, Texas. "Hank was like, 'Hey, why don't we do a test to see, just real quick?'" Wilkinson says. "I did it and we found out and we just sat on the baggage claim as everything hit us at once." The first person they told: Hugh Hefner, whom Wilkinson split from in October.

See what Kendra looked like as a kid.

"I called Hef because I had to tell him right away," Wilkinson says. "He was like, 'Oh my god!' and then he cried." (Hef's role in the baby's life? "Hef will be The Godfather!") If it's a boy, they'll name him Hank Randall Baskett IV. A girl would be either Arianna and Kianna. They find out the baby's sex in the next couple of weeks. "Whatever comes out of me, we'll love," Wilkinson says.

Check out Kendra's sexy Us Weekly photo shoot.

Having kids has been on Baskett's mind since he first met his bride, he says. "It's something we've talked about and wanted since we met," Baskett says. "Being a loving husband and father is what I've always described as the definition of a successful man."

Getting pregnant was easy. But dealing with the side effects...not so much. "I've thrown up in almost every limo that has taken me out in the last week," says Wilkinson -- who is craving grapes and Top Ramen noodle soups. "God, [the drivers] hate me right now."

See what other star moms craved while pregnant.

(Although the morning sickness isn't enough to keep her from having more kids. "We definitely want another kid right away, because we want the two kids to be close in age. We want four, but you know, we are taking it one step at a time. We're concentrating on our first child and seeing where things go from there.")

The baby's birth won't be captured by reality TV cameras. And Wilkinson says she's not doing it naturally. "I'm getting an epidural, everything they can give me," she says. "That's the one thing I'm nervous about the most."

Check out pics of stylish moms on the go.

For now, they're focusing on last-minute preparations for their June 27 wedding at the Playboy mansion -- including having Wilkinson's dress taken out a bit. "My boobs went from big to humongous," she jokes. "They're making some changes in the bust."

But her stomach isn't showing a bump yet. "Right now you can't see it, but it's there," she says.