Delaney Quinn

as Freddy

Caleb Williams

as Wade

Bennie Taylor

as Mailman Miles

Eric Bauza

as Mr. Mailbox / Worry Well / Couchy / Trashy / Pee Flower (voice)

Patton Oswalt

as Strappy (voice)

Sergey Zhuravsky

as Buddy (Suit)

Keegan-Michael Key

as Buddy / Dark Buddy (voice)

Luke Speakman

as Josh