- Andy Richter - Simon Christini
- Julie Warner - Rose Pinchbinder
- Vivica A. Fox - Mrs. Jackson
- Todd Sherry - Todd
- Noah Crawford - Stan
- Nicole Sullivan - Kreuftlva
- Nick Palatas - Skeet
- Tristin Mays - Hailey
- Christine Scott Bennett - Emily
- Justin Bieber - Justin Bieber
- Julie Bowen - Claire Underwood
- Dave Foley - Ted Bagley, Jr.
- Yvette Nicole Brown - Coral Barns
- Arden Myrin - Jenna Lutrell
- Rachael Harris - Kitty Monreaux
- Gail O'Grady - Sophie Girard
- Kelly Perine - Larry Jackson
- Ian Gomez - Jobi Castanueva
- Victoria Justice - Vivian
- Jack Plotnick - Matsor LaRue
- Melanie Paxson - Doris Aidem
- Philip Baker Hall - Mr. Jenkins
- Janel Parrish - Kyla
- Natasha Bedingfield - Herself
- Tyler James Williams - Justin Webber
- Jennette McCurdy - Pinky Turzo
- Richard Karn - Fire Marshal O'Bannon
- Laura Marano - Molly
- Bobb'e J. Thompson - Nate
- Pamela Adlon - Babs
- Kevin Farley - Officer Hooley
- Travis Schuldt - Lance Whipple
- Wendie Malick - Libby Gibbils
- Stephen Tobolowsky - Lars Balthazar
- Craig Anton - Snackleberry Junction chef
- Willow Smith - Young True
- Italia Ricci - Herself / Trish Kavanaugh
- Nathan Kress - Prince Gabriel
- John Cena - Himself / Tate Blizzard
- Oliver Muirhead - Ian
- Tom Kenny - Bingo
- Ian Reed Kesler - Stu
- J.P. Manoux - Snackleberry Junction waiter
- Paul F. Tompkins - Royce Bingham
- Stephen Dunham - Chad Brackett
- Gage Golightly - Vanessa
- Lance Robertson - DJ Lance Rock
- Samantha Boscarino - Carla Gustav
- Michele Boyd - Nicole
- Stefán Karl Stefánsson - Karl Gustav
- Hayley Erin - Sienna
- Cymphonique Miller - Bernie
- French Stewart - Donald the Delightful
- Donovan Dustin - Young Ryan
- Ava Allan - Young Amanda
- Steve Joe - Frank Woo
- Leon G. Thomas III - Himself
- Karlton Johnson - Ticket Taker
- David Pires - Woody Allen
- James Patrick Stuart - Burt Burlington
- Vincent Ventresca - Mr. Jameson
- Vincent Ventresca - Mr. Jamerson
- Henry Hereford - Ryan's Great Grandfather
- Taylor Parks - Shelley
- Taylor Parks - Shelly
- Jimmy Pardo - Joey Dee
- Sarah Donaldson - Mad Style Employee
- Tom Gammill - Tom Doozie
- Julia Duffy - Ms. Watson
- Dave Allen - Mitchell
- Jo-Anne Krupa - Ella
- Deon Aumaier - Stiltwalker
- Trevor Brown - Mikey J
- Kyle Dietz - Kyle Sandbox
- Jake Borelli - Harvey
- Rick Overton - (voice)
- Rick Overton - Jimmy's Dad
- Tim Bagley - Edward Wheeler
- Azael Cavazos - Lima Llama Player
- Jordan Black - Uncle Troy
- Zac Goodspeed - Chase
- Jordan Monaghan - Kelsey
- Alex Staggs - Colonial Mailman
- Jamal Thomas - Colonial Soldier
- Thomas F. Wilson - Ben Franklin
- Dan Kopelman - Kopelman
- Joy Osmanski - Miss Park
- Jesse Mackey - Beatboxer (Town Crier)
- Jesse Mackey - Beatboxer
- Jessica Makinson - Rude Airline Passenger
- Christian Jacobs - Plex (voice)
- Adam Deibert - Muno (voice)
- Kevin Scott Allen - French Employee
- David Crespin - Muno
- Chase Kim - Detective Kim
- Malana Lea - Isabelle
- Allan Murray - Friendly Bank Robber
- Erin Pearce - Toodee (voice)
- Emma Penrose - Foofa (voice)
- Keith Pillow - Minister
- Amos Watene - Brobee (voice)
- Lori Coulis - Plex (uncredited)
- Nick Benson - Bully
- Logan Grove - Joe
- Laura Mann - Woman
- Keke Palmer
Rick Overton interpreta a Jimmy's Dad en la serie.
Stephen Tobolowsky interpreta a Lars Balthazar en la serie.
Thomas F. Wilson interpreta a Ben Franklin en la serie.
Philip Baker Hall interpreta a Mr. Jenkins en la serie.
Keke Palmer hace el papel de True Jackson.
Vivica A. Fox interpreta a Mrs. Jackson en la serie.
Danielle Bisutti interpreta a Amanda Cantwell en la serie.
Matt Shively interpreta a Ryan Leslie Laserbeam en la serie.
Ashley Argota interpreta a Lulu en la serie.
Ron Butler hace el papel de Oscar.
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