"They have been keeping the baby a secret," the source tells Us. "They tried as soon as they were married. Zach is going to be an amazing father. They are looking to get a bigger place down the road."
The soon-to-be first-time dad, 43, skipped out from attending the Toronto Film Festival -- where he was to promote his film You Are Here --- to be by his wife's side in the delivery room. "[Zach] missed the premiere because his wife is very pregnant and about to give birth and he did not want to take the chance of not being in LA if she went into labor," the director of the film, Matthew Weiner tells Us.
"They are in LA now. Everyone is super excited for them, but missing him in Toronto!" the source added.
Galifianakis has been open about his desire for a family with Lundberg, 30, and recently told Rolling Stone, "I've been wanting kids for 10 years," the actor revealed. "I'd love to adopt, have them naturally -- all of it. I want, like, 15." As for his wife, Galifianakis has always been smitten. "Quinn is the coolest," he said. "The coolest."
Galifianakis and Lundberg, the co-founder of the charity Growing Voices, tied the knot in Vancouver, Canada in August 2012.