Nicole Kidman and husband Keith Urban have surprised celebrity fans by announcing they have become parents again! The couple, who already have two-year-old daughter Sunday Rose, used a surrogate to have a second baby, reports the Daily Mail.

The baby girl, named Faith Margaret, was born last month in Nashville. The couple did not reveal they were expecting during the pregnancy and have not commented on their reasons for using a surrogate. Sunday Rose was born to Nicole two years ago without the use of a “gestational carrier” (Nicole's term for the surrogate mum) but Nicole and Keith have confirmed that they are the biological parents of the new arrival.

“No words can convey the incredible gratitude that we feel for everyone who was so supportive throughout this process, in particular our gestational carrier,” Nicole said in a statement released yesterday.

Nicole also has two adopted children with ex-husband Tom Cruise. She plans to take the next six months out as maternity leave to concentrate on her expanding family.