Christensen gave birth to Shane, her first child, last week on Tuesday (June 21, 2016).
Shane made her Instagram debut yesterday, with Christensen captioning the adorable snap, “😍 Week one down with the new BFF. Our girl Shane is killing the newborn game.”
Christensen and her husband, Cole Maness, are notoriously private and kept news of her pregnancy under wraps until she appeared on the red carpet for her new movie Confirmation in March, showcasing a visible baby bump.
Christensen and Maness, a cyclist, have been married since September 2015.