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Jennifer Garner gave birth to her first son, who she and husband Ben Affleck have named Samuel Garner Affleck, on February 27, ET can now confirm.
The superstar couple's new addition was born in Santa Monica, California, joining big sisters Violet, 6, and Serafina, 3.
For months it had been speculated that Jennifer and Ben would welcome a baby boy to their growing family, yet the couple would neither confirm nor deny the sex of the baby.
Jen, 39, and Ben, 39, announced the happy news in August of 2011, telling the Associated Press they were "thrilled" to announce their third bundle of joy was indeed on the way.