Buddy

Cristin Milioti

as Grace

Delaney Quinn

as Freddy

Topher Grace

as Ben

Keegan-Michael Key

as Buddy the Unicorn (voice)

Michael Shannon

as Charlie the Train (voice) / Willie (voice)

Patton Oswalt

as Strappy (voice)

Clint Howard

as George (voice)

Sergey Zhuravsky

as Buddy the Unicorn

Madison Polan

as Hannah

Bryson JonSteele

as Derek

Seamus Flynn

as Timothy

Bennie Taylor

as Mailman Miles

Mark Aaron Buerkle

as Therapist (Day Player)

Phuong Kubacki

as

Luke Speakman

as Josh

Tristan Borders

as Oliver

Caleb Williams

as Wade

Conner Stumm

as Mailman Justin

Eric Salazar

as Dad

Lynette Eklund

as Puppeteer

Tory J. Malone

as Tyler

Rachel Appelbaum

as Clocky / Mr. Mailbox

Cedwan Hook

as Betty Bunny Puppeteer

Jonathan Yurco

as Dark Buddy

Frank Brown Jr.

as Father