Ben Affleck and Jennifer Garner are celebrating the birth of their third child.

The actor used Facebook to say that he and his wife are "happy" to announce the arrival of Samuel Garner Affleck on February 27. He described the baby as "healthy".

The little boy is the couple's first son. They also have daughters Violet, six, and Seraphina, three.

Affleck and Garner married in 2005 after meeting on the set of the movie Daredevil, which was based on a comic book series.