| Person | Type | Job | Role(s) | Episodes |
|---|---|---|---|---|
 Rhett McLaughlin | Crew | Writing | Writer, Creator | 946 |
 Link Neal | Crew | Writing | Writer, Creator | 946 |
 Brian Jaggers | Crew | Editing | Editor | 1 |
 Genji Keen | Crew | Directing | Director | 42 |
Morgan Locke | Crew | Directing | Director | 738 |
 'Weird Al' Yankovic | Cast | Actor | Self | 2 |
 Alfonso Ribeiro | Cast | Actor | Self | 1 |
 Bill Hader | Cast | Actor | Self | 1 |
 Chester Bennington | Cast | Actor | Self | 1 |
 Craig Robinson | Cast | Actor | Self | 1 |
 Daniel Radcliffe | Cast | Actor | Self | 1 |
 Haley Joel Osment | Cast | Actor | Self | 1 |
 Jack Black | Cast | Actor | Self | 3 |
 Janel Parrish | Cast | Actress | Self | 1 |
 Jimmi Simpson | Cast | Actor | Self | 2 |
 Joe Manganiello | Cast | Actor | Self | 1 |
 Kareem Abdul-Jabbar | Cast | Actor | Self | 1 |
 Larry King | Cast | Actor | Self | 1 |
 Max Greenfield | Cast | Actor | Self | 1 |
 Mike Shinoda | Cast | Actor | Self | 1 |
 Nick Cannon | Cast | Actor | Self | 1 |
 Padma Lakshmi | Cast | Actress | Self | 1 |
 Rainn Wilson | Cast | Actor | Self | 1 |
 Steve Howey | Cast | Actor | Self | 1 |
 Sugar Ray Leonard | Cast | Actor | Self | 1 |
 Terry Crews | Cast | Actor | Self | 1 |
 Zach Braff | Cast | Actor | Self | 2 |
 Adam Lambert | Cast | Actor | Self | 1 |
 Amy Schumer | Cast | Actress | Self | 1 |
 Felicia Day | Cast | Actress | Self | 1 |
 Gregg Sulkin | Cast | Actor | Self | 1 |
 Jay DeMarcus | Cast | Actor | Self [Rascal Flatts] | 1 |
 Jeremiah Benjamin | Cast | Actor | Self | 1 |
 Joe Don Rooney | Cast | Actor | Self [Rascal Flatts] | 1 |
 June Diane Raphael | Cast | Actress | Self | 1 |
 Keke Palmer | Cast | Actress | Self | 1 |
 Langhorne Slim | Cast | Actor | Self | 1 |
 Megan Fox | Cast | Actress | Self | 1 |
 Nicholas Theodore Nemeth | Cast | Actor | Self | 1 |
 Nick Kroll | Cast | Actor | Self | 1 |
 Paul Scheer | Cast | Actor | Self | 1 |
 Rob Huebel | Cast | Actor | Self | 2 |
 Shanola Hampton | Cast | Actress | Self | 1 |
 Adande 'Swoozie' Thorne | Cast | Actor | Self | 2 |
 Arielle Vandenberg | Cast | Actress | Self | 2 |
 Arin Hanson | Cast | Actor | Self | 2 |
 Ben Schwartz | Cast | Actor | Self | 1 |
 Candice Patton | Cast | Actress | Self | 1 |
 Chris Sullivan | Cast | Actor | Self | 2 |
 Derek Hough | Cast | Actor | Self | 1 |
 Eliza Coupe | Cast | Actress | Self | 1 |
 Kunal Nayyar | Cast | Actor | Self | 1 |
Mike Pasley | Cast | Self | 1 | |
 Nina Dobrev | Cast | Actress | Self | 1 |
 Pete Holmes | Cast | Actor | Self | 2 |
 Rebecca Quin | Cast | Actress | Self | 1 |
Rhett McLaughlin | Cast | Actor | Himself | 2630 |
 Robert Kirkman | Cast | Actor | Self | 1 |
 Thomas Middleditch | Cast | Actor | Self | 1 |
 Abbi Jacobson | Cast | Actress | Self | 1 |
 Andrew Bachelor | Cast | Actor | King Bach | 2 |
 Anna Akana | Cast | Actress | Self | 1 |
 Chandler Riggs | Cast | Actor | Self | 1 |
 D'Arcy Carden | Cast | Actress | Self | 1 |
 Dacre Montgomery | Cast | Actor | Self | 1 |
 Dan Avidan | Cast | Actor | Self | 2 |
 Derek Wilson | Cast | Actor | Self | 1 |
 Esther Povitsky | Cast | Actress | Self | 1 |
 Harley Morenstein | Cast | Actor | Self | 2 |
 Jameela Jamil | Cast | Actress | Self | 1 |
 Mamrie Hart | Cast | Actress | Self | 1 |
 Cody Simpson | Cast | Actor | Self | 1 |
 Collins Key | Cast | Actor | Self | 1 |
 Grace Helbig | Cast | Actress | Self | 2 |
 Hannah Hart | Cast | Actress | Herself | 2 |
 Joey Graceffa | Cast | Actor | Self | 1 |
 Lindsey Stirling | Cast | Actress | Self | 1 |
 Cameron Esposito | Cast | Actress | Self | 1 |
 PewDiePie | Cast | Actor | Self | 1 |
 Jimmy Tatro | Cast | Actor | Self | 1 |
 Joe Keery | Cast | Actor | Self | 1 |
 Mitch Grassi | Cast | Actor | Self | 1 |
 Nicholas Hamilton | Cast | Actor | Self | 1 |
 Scott Hoying | Cast | Actor | Self | 1 |
 Devan Key | Cast | Actor | Self | 1 |
 Ethan Klein | Cast | Actor | Self | 2 |
 Eva Marisol Gutowski | Cast | Actress | Self | 1 |
 Hila Klein | Cast | Actress | Self | 2 |
 Post Malone | Cast | Actor | Self | 2 |
 River Butcher | Cast | Self | 1 | |
Link Neal | Cast | Actor | Himself | 2630 |
 Kelsea Ballerini | Cast | Actress | Self | 2 |
 Justine Ezarik | Cast | Actress | Self | 1 |
 Kandee Johnson | Cast | Actress | Self | 2 |
 Jordan Morris | Cast | Actor | Restaurant Worker | 1 |
 Jon Bailey | Cast | Actor | Movie Plot Narrator | 1 |
 Dr. Sandra Lee | Cast | Actress | Self | 2 |
 Markiplier | Cast | Actor | Self | 2 |
 Matthew Patrick | Cast | Actor | Self | 1 |
Stevie Wynne Levine | Cast | Self | 2 | |
 John Patrick "Jack" Douglass | Cast | Actor | Self | 1 |
 Seán McLoughlin | Cast | Actor | Self | 1 |
Sofie Dossi | Cast | Actress | Self | 1 |
 Karamo Brown | Cast | Actor | Self | 1 |
Jean Franzblau | Cast | Self | 2 | |
 Christine Medrano | Cast | Actress | Restaurant Worker | 1 |
 Calum Hood | Cast | Actor | Self | 1 |
 Michael Clifford | Cast | Actor | Self | 1 |
 Ashton Irwin | Cast | Actor | Self | 1 |
 Luke Hemmings | Cast | Actor | Self | 1 |
Davin Tjen | Cast | Self | 1 | |
 Rosanna Pansino | Cast | Actress | Self | 2 |
 Emily Fleming | Cast | Actress | Waiter | 1 |
 Gary LeVox | Cast | Actor | Self [Rascal Flatts] | 1 |
 Adam Met | Cast | Actor | Self | 1 |
 Jack Met | Cast | Actor | Self | 1 |
 Ryan Met | Cast | Self | 1 | |
 Simone Giertz | Cast | Self | 2 | |
 Jen Matichuk | Cast | Self | 130 | |
 Andrew Rea | Cast | Actor | Self | 1 |
 Emma Chamberlain | Cast | Actress | Self | 1 |
 Mitchell Moffit | Cast | Actor | Self | 2 |
 Ninja | Cast | Actor | Self | 1 |
 Elle Mills | Cast | Actress | Self | 1 |
Ellie McElvain | Cast | Self | 5 | |
 Sarah Kaufmann | Cast | Actress | Self | 2 |
William Haynes | Cast | Self | 2 | |
Aly Moore | Cast | Actress | Self | 2 |
Mara Connor | Cast | Actress | Self | 1 |
 Matt Lieb | Cast | Actor | Restaurant Worker | 1 |
The Valleyfolk | Cast | Themselves | 1 | |
De'arra Taylor | Cast | Self | 1 | |
Greg Johnson | Cast | Self | 1 | |
David Hill | Cast | Self | 1 | |
Ken Walker | Cast | Ken 4 Life | 1 | |
Chase Hilt | Cast | Self | 1 | |
Gregory Brown | Cast | Self | 2 | |
Lhouraii Li | Cast | Self (Outro) | 1 | |
Nataly Dawn | Cast | Self | 1 | |
Trevor Evarts | Cast | Self | 1 | |
Goorgen Zagarian | Cast | Self | 1 | |
Jasher Drake | Cast | Self | 1 | |
Jack Conte | Cast | Self | 1 | |
Michael Stevens | Cast | Self | 1 | |
Sean Michael O'Brien | Cast | Self | 1 | |
Jen Glantz | Cast | Self | 1 | |
Anthony Gonzalez | Cast | Self | 1 | |
Mariachi Divas | Cast | Themselves | 1 | |
 Madison Beer | Cast | Actress | Self - Guest | 1 |
 Marshmello | Cast | Actor | Self | 1 |
| Person | Type | Job | Role(s) | Episodes |
