Hailee Steinfeld as Megan Walsh

Sophie Turner as Heather

Jessica Alba as Victoria Knox

Samuel L. Jackson as Hardman

Dove Cameron as Liz Larson

Thomas Mann as Roger Marcus

Gabriel Basso as Gooch

Emma Holzer as Donna

Rob Huebel as Mr. Marcus

Jaime King as Special Analyst Knight

Rachael Harris as Mrs. Larson

Dan Fogler as Mr. Drumm

Jason Ian Drucker as Parker Larson

Toby Sebastian as Cash Fenton

Alexandra Krosney as Cindy

Finesse Mitchell as Principal Weissman

Bruno Gunn as Henchman Jones

Steve-O as Pedro

Kathrine Herzer as Melinda

Autumn Dial as Missy

Tarek Bishara as Mr. Bishops

Lo Bishop as Clare

Annie Park as A.J.

Kate Kneeland as Coach Hughes

Cameron Fuller as Leonard Steinman

Daniel Spink as Henchman Davey

Madeleine Stack as Megan (8)

Eva G. Cooper as Heather (8)

Andre Pushkin as Man on Subway

Devin Marcus Miller as Heckler #1

Isabella Amara as Heckler #2

Demetrius Bridges as Jock #1

Michael Provost as Jock #2

Christopher Nathan as Fred the Freshman

Challee Johnson as Waffles Girl

Abigail Gamache as High School Student (uncredited)

Ian Gregg as Second Guy (uncredited)

Marina Hova as High School Student (uncredited)

Algee Smith as Jock (uncredited)

Lauren Emily Townsend as Party Goer (uncredited)

Bryn Vale as Prescott Student (uncredited)

Topher Grace as Mr. Larson (photograph) (uncredited)