Just like big sister Sunday Rose, Faith Margaret Kidman Urban has sentimental meaning behind her name. Beaming parents Keith Urban and Nicole Kidman walked the SAG Awards red carpet in Hollywood Sunday night (January 30), where they fielded several questions about their brand-new baby girl, born December 28, 2010. E!'s Giuliana Rancic asked Nicole where the name Faith came from.

"We needed to have that through the whole pregnancy," Nicole explained. "That's what it required was a lot of faith. Her name is Faith Margaret ... People call her just Faith, but she's actually Faith Margaret, that Southern double name. Margaret is my grandmother's name. She had her last baby at 49, so she's my inspiration."

Keith and Nicole's oldest daughter has a similarly inspired name.

"Particularly when you don't have someone in your life ... in my experience, Sunday was the loneliest day," Keith revealed on 'The Ellen DeGeneres Show' back in 2009. "It went from being the most dreaded day of the week for us to being the most joyous day, because we just had a family."

Sunday's middle name, Rose, was the name of Keith's late grandmother.

Sunday Rose was born July 7, 2008, joining older half-siblings Isabella and Connor, Nicole's two children from her marriage to Tom Cruise. Sunday was the first biological child for both Nicole and Keith. Faith Margaret is also the couple's biological child, but was born via a gestational carrier. Her impending arrival was kept top-secret, with her famous parents choosing not to announce the pregnancy and waiting until about three weeks after the birth to tell their fans.

"I wanted to tell everybody because I was so excited about it, but at the same time we decided this was our thing together," Nicole explained of keeping mum on the pregnancy. "It kind of just perpetuated itself, and at the end we decided, OK we'll make an announcement. If we can get all the way through, why not? It protects her, and it protects everyone in the situation."

Keith and Nicole have at least one more red carpet to walk before Keith kicks off his Get Closer world tour in April. Nicole is up for an Academy Award for her performance in 'Rabbit Hole.'

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