Katherine Schwarzenegger has welcomed her first child with husband Chris Pratt .

She gave birth sometime last week to a girl, Pratt revealed Monday in a sweet Instagram post.

We are beyond thrilled to announce the birth of our daughter, Lyla Maria Schwarzenegger Pratt, he captioned a photo of the couples hands holding the newborn. We couldnt be happier. Both mom and baby are doing great. We are extremely blessed. Love Katherine and Chris.

Pratt followed the announcement with a selection of Bible verses celebrating the babys arrival.