Sienna Miller, Baby
Credit: Billy Farrell/BFAnyc/Sipa USA

What a day for baby news! Sienna Miller and her boyfriend, actor Tom Sturridge, welcomed their first child—a daughter—on Sunday, July 8th. The little one shares a birthday with fellow Cancer tot Penelope Scotland Disick, Kourtney Kardashian and Scott Disick's new baby. Congratulations all around!