- 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 hace el papel de Jimmy's Dad.
Stephen Tobolowsky interpreta a Lars Balthazar en la serie.
Thomas F. Wilson interpreta a Ben Franklin en la serie.
Philip Baker Hall hace el papel de Mr. Jenkins.
Keke Palmer hace el papel de True Jackson.
Vivica A. Fox interpreta a Mrs. Jackson en la serie.
Danielle Bisutti hace el papel de Amanda Cantwell.
Matt Shively hace el papel de Ryan Leslie Laserbeam.
Ashley Argota hace el papel de Lulu.
Ron Butler interpreta a Oscar en la serie.
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