Rachel Bilson shared an adorable Instagram of her husband, Hayden Christensen, and their daughter, Briar Rose, on Sunday. The 9-month-old is pictured wearing a yellow floral bucket hat with her hand sweetly placed on her daddy's lap as he blows bubbles. This is the first time the little tot has made an appearance on social media. After joining Instagram in June, Rachel posted a cute photo of matching baby-and-me Star Wars sneakers on June 11. See Briar's precious debut above, and then check out a romantic moment between her proud parents.