The beloved U.S. TV star turned to a surrogate to help the pair start a family, and Burtka will have plenty of experience after fathering another set of twins with his former lover, film producer Lane Janger.
Burtka and Janger became parents to daughter Flynn and son Javin in 2000, but they split in 2004 and Burtka went on to start a relationship with Harris.
But he will need to brush up on his fatherly duties after spending recent years away from the kids.
A source tells America’s Star magazine, “David doesn’t see that much of the children, especially since he’s been with Neil. He chats with both of them on the phone and sends them presents on their birthdays.”