- Jennette McCurdy - Fawn "Ponnie" Liebowitz / Linda
- Perez Hilton - Self
- Cameron Jebo - Gilbert
- Felix Ryan - Damian
- Kesha - Self
- Louie Sebert - Boy with Ice Cream
- Stephen Ford - Dale Squires
- Augie Isaac - Young Jarold
- Winston Story - Sgrodis
- Davis Desmond - Chester Kezner
- Jerry Trainor - Spencer Shay
- Jerry Trainor - Audience member
- Tristin Mays - Sherry
- Melissa Barker - Teacher
- Andy Dubick - Trumpeter
- Michael Grant - Pianist
- Laci Carriere - Little Girl
- Colleen Ballinger - Miranda Sings
- Yvette Nicole Brown - Helen Dubois
- Darsan Solomon - Burf
- Jake Farrow - Rex (voice) (uncredited)
- Charles Shaughnessy - Mason Thornesmith
- Eric Lange - Erwin Sikowitz
- Lane Napper - Lane Alexander
- Solofa Fatu Jr. - Sumo Wrestler
- Jonathan Chase - Dave
- Malcolm Foster Smith - Dorian
- John Brickner - Joey
- Derick Neikirk - Big Man
- Kevin Thompson - Little Person
- Amanda Clayton - Tilda
- Michael Eric Reid - Sinjin Van Cleef
- Joe Camareno - Carl
- Nathan Anderson - Chris Burm
- Max Wright - Little Boy
- Tom Virtue - Joey Ferguson
- David Malkoff - Rick
- Max Bernstein - DJ
- Austin Westbay - Dancer
- Susan Chuang - Mrs. Lee
- Meagan Holder - Hope Quincy
- Jason E. Kelley - Shawn Quincy
- Toussaint Waterman - Trey Dirty
- Laird Macintosh - Carl Gibbons
- Austen Parros - Paramedic
- Stephen A. Chang - Sushi Chef
- Shirley Jones - Mona Patterson
- Jim Pirri - David Vega
- Donte Essien - Dancer
- Tetona Jackson - Dancer
- Marissa Heart - Dancer
- Khameron Lawrence - Dancer
- Christina Sturgeon - Dancer
- Mel Fair - TV Reporter
- John Pirkis - Bizarre Clown
- Willow Geer - Marlene
- Michael Adrian - Alan
- Rodney To - Sushi Chef
- Alexandra Shipp - Elise
- Patrick Cox - Joe
- Corinne Dekker - Kara
- Selwyn Emerson Miller - D.J.
- Jeff Staron - Reggie
- Webster P. Whinery Jr. - Tough Teen
- Erik Betts - Gorilla
- Rob Riggle - Vice Principal Dickers
- Jennifer Carta - Holly Vega
- Jennifer Carta - Holly Vega (voice)
- P.L. Brown - Luther
- Sloane Avery - Kimberly
- Marcus Folmar - Dr. Rhapsody
- Marilyn Harris Smith - André's Grandmother
- Jona Xiao - Nina
- Rylan Lee - Callie
- Lainey Lipson - Girl
- Louanne Kelley - Old Woman
- Ryan Ryusaki - American Soldier
- Ryan Ryusaki - Tough Teen
- David Starzyk - Principal Eichner
- Ritsa Gountoumas - Trina's Opera Voice (voice)
- Clint Carmichael - Gary
- Stacy Chbosky - School Nurse
- Justin Boulet - Dancer
- Ashley Cinq-Mars - Dancer
- Kenneth Rivera - Dancer
- Devin Walker - Dancer
- Charles Wiggins III - Hip-Hop Dancer
- Drake Bell - Drake Bell
- Dennis Haskins - Richard Belding
- Whitney Rose Pynn - Back-Up Singer #1
- Whitney Rose Pynn - Back-Up Singer
- Jay Brian Winnick - Mr. Drysdale
- Rachel Ann Courtney - Lady Gaga Impersonator
- Victor of Aquitaine - Maurice
- Cole Jensen - Francis Thornesmith
- Cole Jensen - Francis
- Aylya Marzolf - Back-Up Singer #2
- Aylya Marzolf - Back-Up Singer
- Jakob Salvati - Feeding Child
- Nicole Clifford - Maryanne
- Lucas Ross - Guitarist
- Vedette Lim - Female Teacher
- Ivan Kalinin - Bandstand Kid
- Veno Miller - Bassist
- Ellington Lee Ratliff - Evan
- Andrew Hilyard - Eli
- Elena Evangelo - Madame Makee
- Roger Narayan - Angry Groundskeeper
- Abigail Wilson - Pretty Ballerina
- John D. Crawford - Liam
- Jeremy Glazer - Paul
- Audi Resendez - Gwen
- Robert Christopher Riley - Derrick
- Austin Anderson - Drummer
- Rachel Currence - A-Lister
- Kyle Dietz - A-Lister
- Corey Eid - Murphy
- Doug Haley - Shawn
- Lauren Hudson - French Horn Girl
- Tabitha Morella - A-Lister
- Graham Miller - Barney Triplett
- Alex Miller - Billy Triplett
- Jeremy Radin - Security Guard
- Andrew Lewis Caldwell - Merl
- Brandon Weaver - Panda
- Brandon Weaver - Dancing Lobster
- Brandon Weaver - Security Guard (voice)
- Brandon Weaver - Fake Policeman
- Brandon Weaver - A.D.
- Brandon Weaver - Gorilla
- Brandon Weaver - Man in Dog Costume
- Troy Doherty - Jarold Ardbeg
- Megan Richie - Young Tori
- Cecelia Antoinette - Carol
- Mando Alvarado - Miguel
- Janet Cao - Maurine
- David Reynolds - Dennis
- Jasper Cole - Oswald
- Sven Holmberg - Charles
- Jeremy Timmins - Food Truck Guy
- Cierra Voelkl - Student
- Jennifer Veal - Chelsea
- Joe Gieb - Captain
- Joseph S. Griffo - First Mate
- Rod Keller - Marshall
- Juliana Long Tyson - Sarah
- Dinora Walcott - Gwenneth
- Anthony M. Bertram - Oliver
- Eva La Dare - Stage Manager
- Catherine Lidstone - Back-Up Singer
- Natasa Fontaine - Costumer
- John Q. Kubin - Drummer
- Brian Maillard - Bassist
- Justin Mortelliti - Acoustic Guitarist
- Aubrey Wood - Keyboardist
- Ryan Alvarez - Quartet Member
- Payson Lewis - Quartet Member
- Ryan Powers - Quartet Member
- Paul Walling - Detective Flanagan
- Max Carver - Evan Smith
- Ryan Greco - Reese
- Renée Taylor - Mammaw
- Ed Brigadier - Maury (voice)
- Craig Frank - Rico
- Jeff Newburg - Engineer
- Tenelle Cadogan - Mrs. Yonders
- Aundrea Fant - Dancer
- Shane Kaufman - Guitar Player
- Erika Rojas - Back-Up Singer
- Erick Nathan - Dancer
- Boo Arnold - Gene
- Alex Weed - Jack
- Titus Makin Jr. - Dancer
- Scheana Marie Shay - Patrice
- Dre Swain - Woman on Phone (voice)
- Brandon W. Jones - Moose
- Aiden Cardei - Surly Waiter
- Rosalie McIntire - Heidi
- Alex Arleo - Bartender
- Kyle Brody - Blackbox Theater Kid
- Damian Gomez - Prison Inmate
- Britney Bailey - Meredith
- Jarrod Bailey - Braden
- Zayd Jaber - Student
- Tina Q. Nguyen - Student
- Valerie Hinkle - Amanda
- Jill Matson - Mrs. Hellberg
- Mackenzie Brooke Smith - Rhoda Hellberg
- David Michael Paul - Tom Vineman
- Jamie Renée Smith - Violet
- John O'Brien - Mr. Mooney
- Casey Canoy - Dancer
- Mason Davis - Ernie
- Joe DiGiovanni - Sherman
- Kelli Erdmann - Back-Up Singer
- Cassie Hernandez - Gabriella
- Jett Wilder - Dancer
- Onyay Pheori - Mom
- Jesse Willhite - Boy
- Dan Schneider - Chris Burm Announcer (voice)
- Dan Schneider - Man
- Dan Schneider - Pajelehoocho Announcer (voice)
- Dan Schneider - Goonter / Flour Bomber (voice)
- Aaron Stall - Randy
- Hayley Holmes - Posey
- Terence J. Rotolo - Mr. Delgado
- Samuel Caruana - Hector
- Edward Hong - Eddie
- Adam Leiva - Manuel
- Shelby Malone - Pretty Girl
- Katie Peterson - Pretty Girl
- Matias Ponce - Mick
- Sarah Rhoades - Pretty Girl
- Jack Salvatore, Jr. - Pajelehoocho Guy
- Lindsay Taylor - Pretty Girl
- Noah Munck - Gibby Gibson
- Skyler Bible - Keyboardist
- Matt Fleckenstein
- Arthur Gradstein
- Warren Bell
- Christopher Nowak
- George Doty IV
- Jake Farrow
- Robin Weiner
- Joe Catania
- Bruce Rand Berman
Drake Bell interpreta a Drake Bell en la serie.
Victoria Justice interpreta a Tori Vega en la serie.
Leon G. Thomas III hace el papel de Andre Harris.
Matt Bennett interpreta a Robbie Shapiro en la serie.
Elizabeth Gillies interpreta a Jade West en la serie.
Ariana Grande hace el papel de Cat Valentine.
Avan Jogia interpreta a Beck Oliver en la serie.
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