 | Bridgit Mendler | ... | Olivia |
 | Adam Hicks | ... | Wen |
 | Hayley Kiyoko | ... | Stella |
 | Naomi Scott | ... | Mo |
 | Blake Michael | ... | Charlie |
 | Nick Roux | ... | Scott |
 | Chris Brochu | ... | Ray |
 | Shishir Kurup | ... | Mo's Father |
 | Tisha Campbell-Martin | ... | Miss Reznick |
 | Christopher McDonald | ... | Principal Brenigan |
 | Bob Jesser | ... | Wen's Dad |
 | Aimee Dale | ... | Stella's Mom |
 | Ariana Smythe | ... | Sydney |
 | Caitlin Ribbans | ... | Jules |
 | Elise Eberle | ... | Patty |
| Riti Sachdeva | ... | Mo's Mother |
| Judith Rane | ... | Gram |
 | Tom Romero | ... | Mr. Prichard |
 | Leedy Corbin | ... | Georgie |
| Tomas Sanchez | ... | Cop |
| Edward A. Duran | ... | Beefy guy #1 |
 | Jermaine Washington | ... | Beefy Guy #2 |
 | Brendan Clark | ... | Timothy |
 | Paul Clark | ... | Andrew |
 | Scott Takeda | ... | Stella's Dad |
| Isaac Kappy | ... | Mel |
| Pamela McCreary | ... | Secretary |
| Johnnie Hector | ... | Coach |
| Phil Luna | ... | Charlie's Dad |
 | Lora Martinez-Cunningham | ... | Charlie's Mom (as Lora Cunningham) |
| Ryan Montano | ... | Tommy |
 | Jayna Jordan | ... | Victoria (as Jayna Jordan Sweet) |
| Chiara Brokaw | ... | Alex |
 | Nicholas Martinez | ... | Freshman Singer (as Nick Martinez) |
 | Christopher Scott | ... | Dancer |
 | Lance Guillermo | ... | Dancer |
 | Luis Rosado | ... | Dancer |
| David Shreibman | ... | Dancer |
| Brandon Shaw | ... | Dancer |
 | Jesse Brown | ... | Dancer (as Jesse Casper Brown) |
| Jamile McGee | ... | Dancer |
| rest of cast listed alphabetically: |
| Joshua Drew | ... | Dancer |
| Riti Sachdeva | ... | Mo mother |
 | Phil Arnold | ... | High School Music Teacher (uncredited) |
| Aarti K. Attreya | ... | Extra (uncredited) |
| Richard Barela | ... | Faculty Member (uncredited) |
| Kaitlyn Barlow | ... | Cheerleader (uncredited) |
 | Arthur Bedran | ... | High school student (uncredited) |
 | Tina Borek | ... | Band Roadie (uncredited) |
 | Vernon Bradley | ... | Plaza Shopper (uncredited) |
| Lava Buckley | ... | Turbo Blast Yoga Girl (uncredited) |
 | Steven Ray Byrd | ... | Detective (uncredited) |
 | Lance Capaldi | ... | Ticket Taker (uncredited) |
| Shane Crown | ... | Turbo Blast Runner (uncredited) |
| Cathleen Daly | ... | Shakespeare Club / Basement Kid (uncredited) |
| Jared Giese | ... | Shakespeare Club / Basement Kid (uncredited) |
 | Cliff Gravel | ... | Wedding Guest (uncredited) |
 | Eriks Alfons Hausmanis | ... | Basketball Coach (uncredited) |
 | Karen M. Hudson | ... | Wedding Guest with hat (uncredited) |
 | Will D. Barnes III | ... | Pizza Restaurant Employee (uncredited) |
 | Bob Kaye | ... | Ray's Dad (uncredited) |
| Lauren Poole | ... | Moxie Morris (uncredited) |
| David T. Quan | ... | Videographer / Roadie (uncredited) |
| Grizelda Quintana | ... | Teacher (uncredited) |
 | Kelly Ruble | ... | TV Floor Manager (uncredited) |
| James Lawrence Sicard | ... | Turbo Blast Sponsor (uncredited) |
