The Australian actress Nicole Kidman and her husband Keith Urban arrived back in Los Angeles with their daughters Sunday and Faith after a short holiday in her Australian hometown.

Nicole Kidman and Keith Urban have added a second daughter to their family, born through a surrogate mother.

The couple announced Monday the arrival of Faith Margaret Kidman Urban, born on Dec. 28 at a Nashville, Tenn., hospital.

Kidman and Urban released a statement saying they are "truly blessed" and thanked everyone for their support, "our gestational carrier" in particular. The couple also has a 2-year-old daughter, Sunday Rose.

Kidman credited her first daughter's unexpected appearance to swimming in the waters of a small Australian Outback town during the filming of "Australia." She and six other women became pregnant after swimming in Kununurra.

No other details about Faith Margaret were available.

Nicole Kidman and Keith Urban have celebrated their fourth wedding anniversary over dinner at Flyte in Nashville.

The couple, who married in 2006, were given a private booth in the corner of the restaurant, which is frequently patronised by stars such as Shania Twain and Taylor Swift, reports People.

"[Nicole] looked stunning, very understated in a sleeveless dress and sandals," said a source.

"They were smiling and holding hands across the table. You could tell they were so in love."

Employees went on to describe the pair as "a delight" after they stayed to talk with staff after their meal.