Nicole Kidman said she kept the news about her baby daughter Faith Margaret quiet because she and hubby Keith Urban "just decided this was our thing together."

"I wanted to be able to tell everybody, because I was so excited about her," the 43-year-old Far And Away star told E!'s Giuliana Rancic at Sunday's SAG Awards.

Faith Margaret was born on December 28, 2010, weighing 8 pounds and 9 ounces, to a surrogate at Nashville's Women's Hospital at Centennial Medical Center.