Credit: NATIONAL PHOTO GROUP

Welcome to the family, baby boy Affleck!

Jennifer Garner and her husband of seven years, Ben Affleck, became parents for the third time when the actress gave birth to their son in Santa Monica, Calif.

As the family -- including big sisters Violet, 6, and Seraphina, 3  -- celebrate the arrival of their new A-list tot, take a look back at Garner’s pregnancy in Us Weekly's photo slideshow now!