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Nicole Kidman explains keeping her daughter a secret for so long.

Last night at the SAG Awards, all the interviewers were scrambling to get a word with new mom Nicole.  She dished on the red carpet about the motivation behind the decision to keep daughter Faith a secret.  "I wanted to be able to tell everybody because I was so excited about her. We just decided this was our thing together. It kind of just perpetuated itself. It protects her and it protects everyone in the situation."

The mother of four also explained the inspiration behind Faith Margaret's name.  On Faith: "We needed to have that through the whole pregnancy. That's what it required — a lot of faith."  And as for Margaret:  "It's that southern double name." Margaret is Nicole's grandmother's name.  She said of her grandmother, who had her last child at age 49: "She's my inspiration."