Hailee Steinfeld as Nadine Franklin

Woody Harrelson as Mr. Bruner

Haley Lu Richardson as Krista

Blake Jenner as Darian Franklin

Kyra Sedgwick as Mona Franklin

Hayden Szeto as Erwin Kim

Alexander Calvert as Nick Mossman

Eric Keenleyside as Tom Franklin

Nesta Cooper as Shannon

Meredith Monroe as Greer

Katie Stuart as Jeannie

Lina Renna as Little Nadine

Christian Michael Cooper as Little Darian

Ava Grace Cooper as Little Krista

Laine MacNeil as TCBY Girl

Jena Skodje as Little Mean Girl

Daniel Bacon as Film Festival Emcee

Kavandeep Hayre as Teammate

Lyle Reginald as Junior Guy

Chris Shields as Hospital Official

Christian Lagasse as Usher

Lauren K. Robek as Krista's Mom

Laura Ward as Erwin's Friend (uncredited)