• 
  Tony Hale

  Alexander
• 
  Jeffrey Hanson

  Conductor
• 
  Bill Skarsgård

  Kane
• 
  David Rysdahl

  Mike
• 
  Elizaveta Shaikhulina

  Violinist
• 
  Arianna Ortiz

  Maria
• 
  Taran Marshall

  Bully
• 
  Perry Smith

  Anne

• 
  Caleb Fralick

  Bully 2
• 
  Geraldine Hughes

  Colleen
• 
  Amy Brown

  Candidate 1
• 
  Sterlin English

  Rick (14 Years Old)
• 
  David Stevens

  Candidate 2
• 
  Erika Vásquez

  Luiza
• 
  Álvaro Cortez

  Fernando

• 
  Benedict Wong

  Kyo
• 
  Zazie Beetz

  Emma
• 
  Winston Duke

  Will
• 
  Eliza de Azevedo Brown

  Amanda (8 Years Old)
• 
  Lisa Starrett

  Amanda
• 
  Cherie Julander

  Aunt
• 
  Eric Ramaekers

  Amanda's Dad
• 
  Brandy Pitcher

  Amanda's Mom