christina-applegate230people.jpgBreast cancer survivor Christina Applegate gave birth to baby girl Sadie Grace on January 27, and since then, mommy life has definitely changed the actress for the better.

The Married With Children star resides in L.A. with musician fiancé Martyn LeNoble, a Dutch bassist and founding member of Porno for Pyros, and they are over the moon with their new little bundle of joy.

The Hall Pass star opened up to PEOPLE, revealing:

    "She's healed me in so many ways. She's just made my life so much better. She's opened my whole soul. I felt my heart literally open up for the first time and like wrap itself around her. It was profound. And I'm more in love with her every minute of the day."

Considering Applegate opted for a double mastectomy, after being diagnosed with breast cancer in 2008, she definitely appreciates the little things in life that much more.

The actress reveals:

    "I want to be the ultimate burper and diaper-changer, I want to be the ultimate at all of it. Sometimes I stand there going, 'I'm not doing any of this right!' And then I get this big man belch out of her and I go, 'Ah, we accomplished this together'."

Congrats to the happy couple! Now when's the wedding?

Find out what Applegate had to say about going through her battle with breast cancer, after the jump ...