Jack Gaffigan is the elder son of Jim Gaffigan and Jeannie Gaffigan. He was delivered during a home birth and was baptized at the Basilica of St. Patrick’s Old Cathedral in Manhattan like the rest of his siblings.
Jack portrayed his dad in youth on The Jim Gaffigan Show. And in 2018, he and his siblings were featured in the video A Short Film by @JeannieGaffigan, written and directed by his mom.
A curious fact: Jim is known for his witty phrases about fatherhood. Thus, he considers parenting to be a cult, whose members try to explain it to others but look like lunatics.