The Parks and Recreation star, 38, gave birth to the couple's second son Friday morning, her rep tells PEOPLE.
Abel James Arnett weighed 7 lbs., 13 oz., and joins older brother Archie, who was born in October 2008.
"Amy, Will, Abel and Archie are all healthy and resting comfortably," says the rep.
Love the name! And yes, I called that it was another boy!