UPDATE:

Ben Affleck took to Facebook Wednesday to confirm he and Jennifer Garner are the proud parents of a baby boy.

"We are happy to announce on February 27, Jennifer gave birth to a healthy baby boy, Samuel Garner Affleck," he wrote.

Congrats to the happy family!

PREVIOUSLY:

Jennifer Garner and Ben Affleck have become parents for the third time, welcoming a baby boy, a source tells Us Weekly.

The newest addition to the Affleck family, whose name has yet to be revealed, joins big sisters Violet, 6, and Seraphina, 3.

Garner and Affleck, one of Hollywood's favorite couples, announced they were expecting their third child back in August, saying they were "thrilled" to be adding to their often-photographed family.

The couple decided not to find out the sex of the baby ahead of time, or at least decided not to make it public, but Garner dished to Ellen DeGeneres on her show about the possibility of having a baby boy in September.

"It would be so weird to have a boy," Garner told DeGeneres, and said her daughters had already picked out a name for the baby if it was girl.

"Daisy Duck Affleck," Garner said. "I can see us going that way."

Garner and Affleck met on the set of 2003's "Daredevil" and were married in 2005.

Check out photos from Garner's third pregnancy below:

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