The couple announced the birth of their daughter, Faith Margaret Kidman Urban, in a statement Monday.
Faith was born Dec. 28 via a surrogate at the Women's Hospital at Centennial Medical Center in Nashville, Tenn. She is the biological child of Urban and Kidman. The couple, both 43, already have a daughter, 2-year-old Sunday Rose.
"Our family is truly blessed, and just so thankful, to have been given the gift of baby Faith Margaret," the couple said in a statement. "No words can adequately convey the incredible gratitude that we feel for everyone who was so supportive throughout this process, in particular our gestational carrier."
Kidman and Urban are the latest celebrity couple to turn to surrogacy on the path to parenthood.
On Christmas Day, Elton John and partner David Furnish became fathers to a baby boy.
John, 63, and Furnish, 48, reportedly consulted with another celebrity couple, Sarah Jessica Parker and Matthew Broderick, about the joys and pitfalls of surrogacy. Parker, 45, and Broderick, 48, used another woman's womb to carry their twin girls, Marion and Tabitha, born in June 2009.
More recently, actor Neil Patrick Harris, 37, and his partner David Burtka welcomed fraternal twins -- boy Gideon Scott and girl Harper Grace -- by a surrogate last October. Earlier, in July, Portuguese soccer star and international sex symbol Cristiano Ronaldo, 25, became dad to a baby boy with the help of an unnamed American woman he paid to be a surrogate.
If it seems as if the number of children being born through surrogates has been growing in recent years, that's because it is. And not just for celebrity parents.
"The vast majority are regular working people," Shirley Zager, director of the Organization of Parents Through Surrogacy, a national support group, told ABCNews.com. "But celebrities bring attention in a good way to surrogacy as an option to consider among other options."
What makes surrogacy an attractive option for some is the fact that the child can be genetically related to one or both parents.
These births don't come cheap, however. Zager puts the average cost between $70,000 and $130,000.
Zager, who has been involved with surrogacy for 25 years, including the birth of her daughter in 1986, estimates that there have been about 30,000 surrogate births since 1976. And that number grows by 1,300 a year.
In addition to married couples, more gays and singles, like Ricky Martin, who had twin sons in 2008, are relying on surrogacy to have children.
The place that many celebrities turn to is the Center for Surrogate Parenting in Los Angeles. Kelsey Grammer and his soon-to-be ex-wife Camille, former "Good Morning America" host Joan Lunden and actresses Angela Bassett and Deidre Hall are former clients -- and those are just the ones who have gone public.
"We have worked with a lot of people in the entertainment industry," program director Joanne Bubrick told ABCNews.com, including, "many high profile people no one knows about, because it's very personal."
John and Furnish went public about the help they received from the center to have their son son Zachary Jackson Levon Furnish-John.