University School Theory

University School Theory is a 2015 teen comedy-drama film directed by Mark Waters.

Summary
A 20-year-old nerdy girl, Linda has to face an 18-year-old stuck-up, aloof Glee club member, Cassidy who became the leader. Cassidy wanted to spread rumors by seeing Linda being tripped over, having spaghetti poured into her head, being pushed out of the way, having wedgies, getting wet willies and many others. Will Linda has to tell the school staff and her friends? Or will be avoid Cassidy for all eternity?

Cast

 * Laura Marano as Linda
 * Kaitlyn Maher as Young Linda
 * Ariel Winter as Teen Linda
 * Victoria Justice as Cassidy, a head Glee club member
 * Kaitlyn Van Item as Young Cassidy
 * Jada Facer as Teen Cassidy
 * Lauren Jauregui as Veronica, one of Linda's friends
 * Avery Clynes as Young Veronica
 * Jade Pettyjohn as Teen Veronica
 * Elizabeth McLaughlin as Bessy, a friend of Linda
 * Maisy Stella as Young Bessy
 * Brooke Hyland as Teen Bessy
 * Chris Colfer as Steven, Linda's crush
 * Louis Tomeo as Young Steven
 * Peyton Meyer as Teen Steven