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Nicole Kidman, 43, may have recently gushed about her marriage to country singer Keith Urban, 43, but the duo have remained more tight-lipped about the latest addition to their family.

The couple's second daughter, Faith Margaret Kidman Urban, was born via surrogacy at Nashville's Centennial Women's Hospital on December 28. "Our family is truly blessed, and just so thankful, to have been given the gift of baby Faith Margaret," Kidman and Urban said in a statement to UsMagazine.com on Monday.

"No words can adequately convey the incredibly gratitude that we feel for everyone who was so supportive throughout the process, in particular our gestational carrier," they said. Though Faith Margaret was carried by a third party, she is biologically both Kidman and Urban's daughter. The couple also have a 2-year-old biological daughter together, Sunday Rose.

Kidman also has two children, Bella, 18, and Connor, 15, from her previous marriage to Tom Cruise. —KIMBERLY STEELE