High School

• 
  Railey Gilliland
  Tegan Quin
• 
  Seazynn Gilliland
  Sara Quin
• 
  Amanda Fix
  Maya
• 
  Cobie Smulders
  Simone Bates
• 
  Esther McGregor
  Natalie
• 
  Olivia Rouyre
  Phoebe
• 
  Brianne Tju
  Ali
• 
  Kyle Bornheimer
  Patrick Twiley
• 
  Geena Meszaros
  Lily
• 
  C.J. Valleroy
  Evan
• 
  Nate Corddry
  David
• 
  Dom Bergeron
  Will
• 
  Nikki Rae Hallow
  Loni
• 
  Christian Humphries
  Andrew
• 
  Jayne Eastwood
  June
• 
  Kate Drummond
  Barbara
• 
  Marcus Della Rosa
  Tyler
• 
  Dan Beirne
  Mr. Gardner
• 
  Hannah Riley
  Cass
• 
  Mary Long
  Mary
• 
  Stephen Tauro
  Ronnie
• 
  Sam Duke
  Josh
• 
  Shawn Seward
  Kevin
• 
  Diana Polowick
  Phoebe's Teacher
• 
  Haylee Thompson
  Autumn
• 
  Alyssa Hassett
  Pretty Girl
• 
  Brent Gill
  Co-Worker
• 
  Connor Fedoroshyn
  Chris
• 
  Autumn T. Dang
  Female Student
• 
  Christopher Heatherington
  English Teacher

• Clea DuVall
• Rebecca Asher

• Clea DuVall
  ...
  (developed by)
• Sara Quin
  ...
  (based on the book 'High School' by)
• Tegan Quin
  ...
  (based on the book 'High School' by)
• Laura Kittrell
  ...
  (teleplay by)