Christina Applegate has been amazing (and completely under-rated) in everything from 1991's Don't Tell Mum The Babysitter's Dead to the much more recent Samantha Who?, but add in the fact that she recently underwent a double mastectomy after being diagnosed with breast cancer, and we really can't think of anyone else in Hollywood more deserving of good news...
The acress's husband, Maryn LeNoble, announced the baby news via a Facebook, declaring the name of his new daughter as Sadie Grace, adding that she weighed in at 7lbs, 8oz.
Meanwhile, a rep for the couple confirmed to People:
"Actress Christina Applegate and fiancé, musician Martyn LeNoble, welcomed daughter Sadie Grace LeNoble on Thursday, Jan. 27, 2011, in Los Angeles. Mother and daughter are doing great."
Applegate, 39, and LeNoble, 41, announced their pregnancy in July, and have been dating for around three years, becoming engaged on Valentine's Day 2010 (any guys reading might like to learn a lesson from that).
Speaking to People magazine last August, Applegate spoke about how she wanted to raise her children:
"I'll probably be a little bit hippie and a little bit Type A. I'll take from what my mother did, which was way hippie and like, 'Do what you wanna do,' and bring some things that I know from watching my friends raise their kids. An amalgamation of sorts."