- Evan Peters as Warren Lipka
- Barry Keoghan as Spencer Reinhard
- Blake Jenner as Chas Allen III
- Jared Abrahamson as Eric Borsuk
- Udo Kier as Mr. Van Der Hoek
- Ann Dowd as Betty Jean Gooch
Warren Lipka, Spencer Reinhard, Chas Allen, Eric Borsuk and Betty Jean Gooch all appear as themselves, along with Reinhard's parents, Allen's mother, Lipka's father, and one of the culprits' teachers.[7]
Additionally, Gary Basaraba and Lara Grice portray Warren's parents, Jane McNeill portrays Spencer's mother, and Whitney Goin portrays Chas's mother. Wayne Duvall appears as Coach Bill Welton.