Gillian Jacobs as Leslie

John Malkovich as Michael

Ryan Simpkins as Young Leslie

Tom Arnold as Alex

Kevin Zegers as Frank

Jermaine Scooter Smith as Young Donnie

Harold Perrineau as Orlando

Jeremy Sisto as Jimmy

Raynold Gideon as Judge Feeney

Cornelia Guest as Mrs. Feeney

Natalie May as Judge's Daughter

Ben Lin as Pa

Alice Lo as Ma

Evan Ross as Donnie

Landall Goolsby as Blackberry John

Raphael Sbarge as Mr. Whitehead

Evan Peters as Rachel / Brian

Kyle Gallner as Ratboy

Ty Simpkins as Dylan Whitehead

Max Van Ville as Surf

Shiloh Fernandez as Cooper