Josh Duhamel and his 'Life as We Know It' costar Katherine Heigl talk about expanding their families with their rock star spouses.
"It's definitely part of the plan," Josh told ET's Kevin Frazier of starting a family with wife and Black Eyed Peas front woman Fergie. "We just need to be in the same city. ... It's just a matter of, like I said, when."
Katherine adopted a baby girl about a year ago named Nancy Leigh Mi-Eun, nicknamed Naleigh, but admitted that she's ready to expand her family even more. "I definitely want to have a lot of kids. I think Josh Kelley is down with it. He seems cool," she said of her musician husband. "His thing is that he's a little nervous about outnumbering us. So, he thinks it should be like one or two and I think it should be like five or six."
As for how many Katherine's costar Josh plans on having, he told ET, "I just want a healthy, happy, little baby. That's it. ... I would like to have a boy and a girl ultimately, but I'll take whatever."
See how Josh and Katherine handle parenthood on the big screen when 'Life as We Know It' hits theaters October 8.