01/31/2011 08:55 am ET | Updated May 25, 2011

Keith Urban, Nicole Kidman's Daughter Faith: Surrogate Birth Inspired Name

Keith Urban and Nicole Kidman had to have faith -- and now they have Faith.

The couple opened up about their new daughter on the red carpet at the Screen Actors Guild Awards on Sunday, talking about the experience of having a child via surrogate and how she got her name.

"Just the way she came into our world -- we needed to have every bit of faith we could muster," Urban told Access Hollywood. "It was completely out of our control. We just kept saying, 'We gotta have faith, we gotta have faith. She's going to be fine.'

"And we just thought, 'What a perfect name for her.'"

So how is the couple's two year old daughter Sunday treating the new addition?

"She's so into [Faith] and she's crazy about her," Kidman said. "We really wanted Sunday to have a sibling, you know, so, so now we've got Sunday and Faith Margaret...we've got our hands full! We're really happy."

Previously, the couple spoke about their choice of surrogate, explaining that they chose an American one for the privacy -- their home country of Australia follows their every move.

In a red carpet interview with E!, Kidman reveals that the baby's middle name, Margaret, comes from her grandmother, who had her last baby at 49 -- her inspiration during the pregnancy.