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After joining Instagram in June, Rachel Bilson has finally shared what appears to be the first photo of her new daughter Briar Rose. Bilson and her partner, Hayden Christensen, welcomed their little girl on Oct. 29 of last year. Although the baby's face isn't visible in Bilson's newly posted photo, it does show the back of her head, adorned with a sweet floral hat, and her little hand on her dad's lap. They sit on a blanket in the grass of a park as Christensen blows bubbles. See the aw-inducing moment here:

Back in 2005, Bilson told InStyle that motherhood was a goal for her. "Having kids and a family is the most important thing," she said. "I've always wanted to be a mom." While she hasn't posted additional photos of her new baby girl, but Bilson has alluded to her newfound motherhood on social media. Earlier this week she posted a picture of Briar Rose's cute toy elephant:

And a week ago she shared a snap of her holding a large cup of coffee with a playpen featured in the background: