Hiegl, 33, and Kelley, 32, previously adopted their first daughter, three-year-old Naleigh from South Korea and recently went for a second adoption but the name is not known yet, reported Showbizspy.
"Yes they have adopted a baby. No further details are available at this time," the couple's representative said.
Heigl said she started having talks about welcoming a second child since January.
"Josh and I started talking about it before we were even engaged. We have talked about having biological children as well but we decided to adopt first. I'd like to adopt again," she said.