(Cover) - EN Showbiz - Katherine Heigl couldnt bear to be parted from her young daughter while she was filming Life as We Know It.

The 31-year-old actress adopted Naleigh from South Korea last year and loves being a mother to the 20-month-old tot. Katherine admits she could not leave her child at home for one moment while she was filming her new romantic comedy alongside Josh Duhamel, so Naleigh accompanied her to the movie set.

"Every day I brought her. I had just become her mother, and I was so obsessed with her," the actress confessed to Extra. "I wanted to be with her all the time."

Josh admits seeing Katherine with Naleigh has made him think about having children with his wife Fergie.

The 37-year-old American actor wed the sexy Black Eyed Peas singer in a romantic ceremony at the Church Estates Vineyards in California in January 2009. He has now admitted that welcoming little bundles of joy into their household is not a matter of if but when. Although Josh is keen to become a father, he realises he will have to fit his plans around Fergies hectic schedule.

"Ive always known that ultimately I wanted to have kids," he said. "Its just a matter of when. My wife Fergie obviously is very busy.

Katherine has teased Josh about being in such a high-profile marriage, joking he and his wife dont have enough time to start trying for a family.

However, the actor strongly denied that was the case.

Im not too busy to get busy, he laughed. (C) Cover Media