Kidman adopted two children with ex-husband Tom Cruise and has two biological children with husband Keith Urban. She told CNN that her desire to have a family stemmed from her own "maternal instincts," which have been a "driving force" in her life since she was a young girl.
"I think because I've experienced motherhood in so many different ways," she said. "I've experienced adoption, birthing a child and I've experienced surrogacy. I'm like when it comes to it, I just wanna be a mama."