Name	Known for
Jim Gaffigan Jim Gaffigan Jim Gaffigan See fewer	Chappaquiddick (2017)
Ashley Williams Jeannie Gaffigan Jeannie Gaffigan See fewer	How I Met Your Mother (2005)
Michael Ian Black Daniel Daniel See fewer	Wet Hot American Summer (2001)
Caitlin Moeller Elizabeth Elizabeth See fewer	The Jim Gaffigan Show (2015)
Adam Goldberg Dave Dave See fewer	A Beautiful Mind (2001)
Andy Richter Mitch Mitch See fewer	Madagascar (2005)
Wolfgang Jackson Lacz James James See fewer	The Jim Gaffigan Show (2015)
Cameron Seely Mary Mary See fewer	The Grinch (2018)
Tongayi Chirisa Father Nicholas Father Nicholas See fewer	The Jim Gaffigan Show (2015)
Ted Alexandro MC MC See fewer	Oz (1997)
Drew Beasley Teenage Mitch Teenage Mitch See fewer	The Amazing Spider-Man 2 (2014)
Karen Bergreen Karen Bergreen Karen Bergreen See fewer	Law & Order (1990)
Emily Borromeo Nerdy Girl Nerdy Girl See fewer	FBI: Most Wanted (2020)
Arthur Lee Dozier Teenage Jim (as Arthur Dozier) Teenage Jim (as Arthur Dozier) See fewer	Stranger Things (2016)
Jack Gaffigan Little Jimmy Little Jimmy See fewer	The Jim Gaffigan Show (2015)
Marre Gaffigan Teenage Pam Teenage Pam See fewer	The Jim Gaffigan Show (2015)
Liam Keenan Little Mitch Little Mitch See fewer	Call Me Crazy (2014)
Chris Mazzilli Chris Mazzilli Chris Mazzilli See fewer	Curveballs
Sam McCarthy Mike Jr Mike Jr See fewer	Dead to Me (2019)
Liam McEneaney Nerd Guy Fan Nerd Guy Fan See fewer	As Long As You're Happy (2023)
Bridget McGarry Teenage Kathy Teenage Kathy See fewer	Blindspot (2015)
Carson Hayes Pacheco Little Joe Little Joe See fewer	The Jim Gaffigan Show (2015)
Faith Logan Comedy Club Patron (uncredited) Comedy Club Patron (uncredited) See fewer	Avengers: Endgame (2019)