Credit: Barry King/FilmMagic

It's a girl for Christina Applegate!

The Going the Distance actress and her fiance, rocker Martyn LeNoble, welcomed Sadie Grace LeNoble on Thurs. Jan. 27 in L.A., her rep tells"Mother and daughter are doing great," the rep says.  Proud papa LeNoble posted the news on his Facebook page late Monday noting that Sadie Grace weighed in at 7 lbs., 8 oz.

A first-time mom, Applegate, 39, confirmed her pregnancy in September.

The Emmy-nominated star's baby joy comes two years after she overcame a bout with breast cancer, following a double mastectomy.

Applegate has credited her baby's dad, a founding member of 90s alternative rock band Porno for Pyros, with helping keep her spirits high during her cancer battle.

"I have a small but mighty support system and Martyn has really been an incredible part of my life," Applegate previously told Us. "Without him, I don't know if I could've gone through any of it. He came around at a time when there was a lot of loss in my life on many levels, so he's been a really incredible help."

The new mom -- who got engaged to LeNoble on Valentine's Day last year -- tells Us she'd welcome the idea of having more kids.

When asked what's on her bucket list, she told Us last year: "Babies, lots of babies. Not lots of babies, but a couple."