EXCLUSIVE: Meet Disney Channel’s new Zac Efron and Demi Lovato hopefuls. The cable channel has assembled the cast of what is being groomed to be its next original movie/musical franchise, Lemonade Mouth, by mixing young Disney series stars and unknowns with TV veterans Tisha Campbell-Martin and Christopher McDonald. The story follows five disparate high school students who meet in detention and form a band. Starring are Bridgit Mendler (Disney Channel’s Good Luck Charlie) as lead vocalist Olivia White, Adam Hicks (Disney XD’s Zeke and Luther) as keyboardist Wen Giford, Hayley Kiyoko (Disney Channel’s Wizards of Waverly Place) as electric guitarist Stella Yamada, Naomi Scott (Disney Channel UK’s Life Bites) as bass guitarist Mohini and Blake Michael (discovered during an open casting call) as percussionist Charlie Delgado. Nick Roux as Scott Pickett, Chris Brochu as Ray Beach will play rival band Mudslide Crush, while Campbell-Martin will play music teacher Miss Reznick and McDonald Principal Brenigan. The movie, slated for a 2011 premiere, was written by April Blair based on the book Lemonade Mouth by Mark Peter Hughes. It is being directed by Patricia Riggen, executive produced by Debra Martin Chase and choreographed by Chris Scott.