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Sienna Miller

Marlowe Ottoline Layng Sturridge – around July 8
Sienna Miller had largely been out of the spotlight the last few years since ending high-profile relationships with Jude Law and Balthazar Getty. So it was surprising when she announced she was expecting … and with little known (at least in America) actor Tom Sturridge. But ever since little Marlowe Ottoline Layng arrived the weekend of July 8 in London, the actress has been vocal about her baby love. “It's still the most surreal thing, that you can create, that I grew this life inside my stomach, her eyeballs, everything -- every little fiber," Miller told Harper’s Bazaar UK in November.

Celebrity Babies of 2012

Blue Ivy, Maxwell Drew, and Tennessee James are just three of the many, many bundles of joy the stork dropped off in Hollywood this year.