Watch Jim Gaffigan's Impossibly Adorable Kids Open For Their Dad At A Show

Comedian Jim Gaffigan has often mentioned his ever-growing brood of children in his stand-up act, and at a recent show, he incorporated them even further: By having them open for him. And the results were more heartwarming than you can imagine.

At his show on December 29 at the Pabst Theater in Milwaukee, Gaffigan's daughter Marre and son Jack came out dressed to the nines to remind audiences to turn off their cell phones. Jack also took some credit for his father's memoir: "I am the author of the title of the book, 'Dad is Fat.'"

The two kids then launched into a song and dance explaining how to spell their last name ("G-A-double F-I-G-A-N spells Gaffigan...") as Marre and Jack's younger siblings Katie and Michael joined them. Gaffigan's wife and producing partner Jeannie finally brought out the baby Patrick to complete the entire Gaffigan clan.

Check out the video above, which was posted to Gaffigan's offical YouTube page. (We presume that this video was filmed with Gaffigan's endorsement -- remember, it's never okay to use your camera phone during a show, comedy or otherwise, without explicit permission.)