It's a Girl for Jennifer Garner & Ben Affleck!

Break out the party hats Violet, you're officially a big sister!

Jennifer Garner gave birth to her second child, a healthy baby girl on Tuesday at Cedars-Sinai Medical Center. No other information was available.

This makes daughter number two for Garner and husband Ben Affleck, both 36, who are already parents to 3-year-old Violet. The ever-shy couple never made a formal announcement about Jen's pregnancy but over the months, it became clear the Alias star was expecting.