"I think I'm just gonna try and keep it a little more mellow," she told PEOPLE of her future plans, "and be a little bit more of a mom, since that's a big part of my life now."
Heigl and husband Josh Kelley adopted daughter Naleigh from South Korea in Sept. 2009.
Though nothing is confirmed, and Heigl could not discuss whether she is indeed leaving Grey's Anatomy, rumors have been mounting that she is finished with the show. Peaking the speculation, Heigl was a no-show on the ABC set this month after taking a three month maternity leave.
"I took those 3 months off and I realized how very, very important is my family is to me and I want to be more available to them," she said Thursday at Las Vegas's ShoWest convention while accepting an award for Female Star Of The Year.
Her family "is wonderful," the actress says. "They're the icing on the cake."