Congratulations are in order for new parents Leighton Meester [1] and Adam Brody [2]! According to Us Weekly, the couple secretly welcomed their first child [3], a baby girl they named Arlo Day, on Aug. 4. Leighton and Adam tied the knot [4] in a top-secret ceremony last year after first making their romance public in February 2013, and her baby bump was front and center [5] when she was spotted out and about in LA this past July.