Billy Farrell/BFAnyc/Sipa USA
Caitlin Petreycik
Jul 09, 2012 @ 3:30 pm

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!

Plus, see more celebrity moms!MORE:Lily Allen Is Expecting!Kourtney Kardashian's Baby GirlAdele Is Pregnant!

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