Stand-up comedian known for his deadpan delivery, his jokes about food, and for assuming the voice of easily-offended listeners. His memoir, Dad Is Fat, was published to good reviews in 2013. He played the character Roy Keene in That '70s Show and has appeared in such films as 13 Going on 30, 17 Again, Away We Go and Hot Pursuit.
He has two daughters and three sons with his wife Jeannie Gaffigan, whom he often writes with as well. He himself grew up in a large family and is the youngest of six children.