<Ul> <Li> Amanda Bynes as Viola / Sebastian Hastings </Li> <Li> Channing Tatum as Duke Orsino </Li> <Li> Laura Ramsey as Olivia Lennox </Li> <Li> Emily Perkins as Eunice Bates , Olivia 's nerdy , eccentric friend and Duke 's lab partner </Li> <Li> James Snyder as Malcolm Festes , the school nerd and Sebastian 's ( Viola 's ) rival </Li> <Li> Robert Hoffman as Justin Drayton , Viola 's ex-boyfriend and Duke 's rival </Li> <Li> James Kirk as Sebastian Hastings </Li> <Li> Alex Breckenridge as Monique Valentine , Sebastian 's superficial girlfriend </Li> <Li> Brandon Jay McLaren as Toby , one of Duke 's best friends </Li> <Li> Clifton Murray as Andrew , one of Duke 's best friends </Li> <Li> Jonathan Sadowski as Paul Antonio , one of Viola 's best friends and hair stylist </Li> <Li> Amanda Crew as Kia , one of Viola 's best friends </Li> <Li> Jessica Lucas as Yvonne , one of Viola 's best friends </Li> <Li> David Cross as Principal Horatio Gold </Li> <Li> Vinnie Jones as Coach Dinklage </Li> <Li> Julie Hagerty as Daphne Hastings , the mother of Viola and Sebastian </Li> <Li> John Pyper - Ferguson as Roger Hastings , the father of Viola and Sebastian </Li> <Li> Lynda Boyd as Cheryl , the debutante ball 's hostess </Li> <Li> Robert Torti as Coach Pistonek </Li> <Li> Mark Acheson as Groundskeeper </Li> </Ul>
who plays unis in she 's the man
Emily Perkins