| Name | Character | Episodes |
|---|---|---|
| Ariana Grande | Cat Valentine | 57 |
| Victoria Justice | Tori Vega | 57 |
| Avan Jogia | Beck Oliver | 57 |
| Elizabeth Gillies | Jade West | 57 |
| Leon Thomas III | Andre Harris | 57 |
| Daniella Monet | Trina Vega | 57 |
| Matt Bennett | Robbie Shapiro | 57 |
| Michael Eric Reid | Sinjin Van Cleef | 50 |
| Eric Lange | Erwin Sikowitz | 27 |
| Lane Napper | Lane Alexander | 19 |
| Jennifer Carta | Holly Vega | 15 |
| Jim Pirri | David Vega | 7 |
| Susan Chuang | Mrs. Lee | 4 |
| Rylan Lee | Callie | 3 |
| Charles Shaughnessy | Mason Thornesmith | 2 |
| Stephen A. Chang | Sushi Chef | 2 |
| P.L. Brown | Luther | 2 |
| Aylya Marzolf | Back-Up Singer #2 | 2 |
| Tetona Jackson | Dancer | 2 |
| David Starzyk | Principal Eichner | 2 |
| Rodney To | Sushi Chef | 2 |
| Jarrod Bailey | Braden | 2 |
| Titus Makin Jr. | Dancer | 1 |
| Alexandra Shipp | Elise | 1 |
| Michael Grant | Pianist | 1 |
| Colleen Ballinger | Miranda Sings | 1 |
| Clint Carmichael | Gary | 1 |
| Perez Hilton | Perez Hilton | 1 |
| Vedette Lim | Female Teacher | 1 |
| Rob Riggle | Vice Principal Dickers | 1 |
| Jennette McCurdy | Fawn "Ponnie" Liebowitz / Linda | 1 |
| Tristin Mays | Sherry | 1 |
| Shirley Jones | Mona Patterson | 1 |
| Troy Doherty | Jarold Ardbeg | 1 |
| Yvette Nicole Brown | Helen Dubois | 1 |
| Renée Taylor | Mammaw | 1 |
| Kesha | Self | 1 |
| Drake Bell | Drake Bell | 1 |
| Tom Virtue | Joey Ferguson | 1 |
| Noah Munck | Gibby Gibson | 1 |
| Dan Schneider | Goonter / Flour Bomber (voice) | 1 |
| Dan Schneider | Man | 1 |
| Dan Schneider | Chris Burm Announcer (voice) | 1 |
| Dan Schneider | Pajelehoocho Announcer (voice) | 1 |
| Boo Arnold | Gene | 1 |
| Jerry Trainor | Spencer Shay | 1 |
| Jerry Trainor | Audience member | 1 |
| Max Carver | Evan Smith | 1 |
| Aylya Marzolf | Back-Up Singer | 1 |
| Jamie Renée Smith | Violet | 1 |
| Sven Holmberg | Charles | 1 |
| Jack Salvatore, Jr. | Pajelehoocho Guy | 1 |
| Marcus Folmar | Dr. Rhapsody | 1 |
| Erik Betts | Gorilla | 1 |
| Alex Weed | Jack | 1 |
| Patrick Cox | Joe | 1 |
| Andrew Lewis Caldwell | Merl | 1 |
| Hayley Holmes | Posey | 1 |
| Mel Fair | TV Reporter | 1 |
| Kevin Thompson | Little Person | 1 |
| Jason E. Kelley | Shawn Quincy | 1 |
| Brandon W. Jones | Moose | 1 |
| Felix Ryan | Damian | 1 |
| Doug Haley | Shawn | 1 |
| Robert Christopher Riley | Derrick | 1 |
| Eva La Dare | Stage Manager | 1 |
| Juliana Long Tyson | Sarah | 1 |
| Amanda Clayton | Tilda | 1 |
| Ed Brigadier | Maury (voice) | 1 |
| Meagan Holder | Hope Quincy | 1 |
| Cameron Jebo | Gilbert | 1 |
| Audi Resendez | Gwen | 1 |
| Laird Macintosh | Carl Gibbons | 1 |
| Justin Mortelliti | Acoustic Guitarist | 1 |
| Jeremy Radin | Security Guard | 1 |
| Ryan Alvarez | Quartet Member | 1 |
| Dinora Walcott | Gwenneth | 1 |
| Stephen Ford | Dale Squires | 1 |
| Cecelia Antoinette | Carol | 1 |
| Brian Maillard | Bassist | 1 |
| Joe Gieb | Captain | 1 |
| Jeremy Glazer | Paul | 1 |
| Stacy Chbosky | School Nurse | 1 |
| Graham Miller | Barney Triplett | 1 |
| Joseph S. Griffo | First Mate | 1 |
| Willow Geer | Marlene | 1 |
| Victor of Aquitaine | Maurice | 1 |
| Aubrey Wood | Keyboardist | 1 |
| Augie Isaac | Young Jarold | 1 |
| Rosalie McIntire | Heidi | 1 |
| John O'Brien | Mr. Mooney | 1 |
| Edward Hong | Eddie | 1 |
| Catherine Lidstone | Back-Up Singer | 1 |
| Matias Ponce | Mick | 1 |
| Cole Jensen | Francis Thornesmith | 1 |
| Melissa Barker | Teacher | 1 |
| Max Bernstein | DJ | 1 |
| Dre Swain | Woman on Phone (voice) | 1 |
| Rod Keller | Marshall | 1 |
| Ryan Powers | Quartet Member | 1 |
| Craig Frank | Rico | 1 |
| Megan Richie | Young Tori | 1 |
| Alex Miller | Billy Triplett | 1 |
| Jett Wilder | Dancer | 1 |
| Jona Xiao | Nina | 1 |
| Scheana Shay Davies | Patrice | 1 |
| Marissa Heart | Dancer | 1 |
| David Malkoff | Rick | 1 |
| Mason Davis | Ernie | 1 |
| Sloane Avery | Kimberly | 1 |
| Shelby Malone | Pretty Girl | 1 |
| Nathan Anderson | Chris Burm | 1 |
| Samuel Caruana | Hector | 1 |