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 ( Bridgit Mendler ) , Mohini `` Mo '' Banjaree ( Naomi Scott ) , Charles `` Charlie '' Delgado ( Blake Michael ) , Stella Yamada ( Hayley Kiyoko ) , and Wendell `` Wen '' Gifford ( Adam Hicks ) all meet in detention , where the supervisor and music teacher Ms. Reznik ( Tisha Campbell-Martin ) 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-