The countdown to baby is on!

Rachel Bilson headed out to grab smoothies with baby daddy Hayden Christensen on Monday in Brentwood, and it appears it won't be long before the actress gives birth to her bundle of joy. Indulge those pregnancy cravings while you still can, girl!

Earlier this month, the Hart of Dixie star celebrated her unborn child with a star-studded baby shower, with guests like Natalie Portman and Jamie King. The brunette beauty and her Canadian beau are reportedly expecting a daughter and couldn't be more thrilled. "She's so excited to be having a baby girl. She's wanted it for a long time and is going to be an amazing mom. Everyone is ecstatic for her," a source revealed to Us Weekly.

The pair broke off their engagement in 2010, but once they become parents, we have a feeling they might want to make it legal!