In the film Lemonade Mouth , Olivia White is played by Bridgit Mendler , Mohini Banjaree by Naomi Scott ) , Charles Delgado by Blake Michael , Stella Yamada by Hayley Kiyoko , and Wendell Gifford by Adam Hicks , and Ms. Reznik by Tisha Campbell-Martin .
Five high school freshmen : Olivia White ( Jessica Sanchez ) , Mohini `` Mo '' Banjaree ( Elise Testone ) , Charles `` Charlie '' Delgado ( DeAndre Brackensick ) , Stella Yamada ( Skylar Laine ) , and Wendell `` Wen '' Gifford ( Colton Dixon ) all meet in detention , where the supervisor and music teacher Ms. Reznik ( Renee Taylor ) rants over the school principal Brenigan ( Christopher McDonald ) having moved all extracurricular activities to the school basement to make room for a new gymnasium .
Lemonade Mouth -LRB-film-RRB-