The couple, who celebrated their eighth wedding anniversary on Sunday, took son Samuel and their daughters Violet, seven, and Seraphina, four, to Garner's family church, the Christ Church United Methodist, so their little boy could be welcomed into the Christian faith, reported People magazine.
A parishioner said, "He's (Samuel) really cute. He was wearing little blue overalls. He kept trying to high-five the pastor as he was getting baptised."
Affleck looked dapper in a fitted suit, while Garner wowed in an elegant white dress.