She's dating an older man (41-year old Nick Cokas) and pretending to be pregnant on screen - but that doesn't mean Katharine McPhee is ready have a bun in her actual oven just yet.
"I [do] definitely want to have a baby, and it's fun to just pretend and look in the mirror," McPhee told Entertainment Tonight this week about wearing a fake bump to shoot House Bunny. "I think it'll probably hold me off a bit on having a baby.
"Today is the first day I'm wearing the prosthetic belly, which wraps all the way around [to] my back, and it's actually really comfortable," the American Idol runner-up added.
The hopeful actress, who told People that she's wearing Nicole Kidman's hand-me-down bump to film the Adam Sandler comedy, also said: "I'm really enjoying it. It's hot and sweaty though, but it's like Method acting."
We're guessing Nicole Richie is wishing she could say the same thing. And so does the unborn child that will soon have this celebrity and Joel Madden as her parents.
Meanwhile, McPhee's costar in the film, Rumer Willis, is having her own troubles with cumbersome costumes. An almost nude picture of the actress wearing just a dunce cap and silver back brace was leaked last week.
"I keep bumping into people and having to apologize to everyone," Willis said. "It's fun though ... I'm just really grateful for the opportunity."