Buddy

Cristin Milioti

Grace

Delaney Quinn

Freddy

Topher Grace

Ben

Keegan-Michael Key

Buddy the Unicorn (voice)

Michael Shannon

Charlie the Train (voice) / Willie (voice)

Patton Oswalt

Strappy (voice)

Clint Howard

George (voice)

Eric Bauza

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

Sergey Zhuravsky

Buddy the Unicorn

Madison Polan

Hannah

Bryson JonSteele

Derek

Seamus Flynn

Timothy

Bennie Taylor

Mailman Miles

Mark Aaron Buerkle

Therapist (Day Player)

Phuong Kubacki

Luke Speakman

Josh

Tristan Borders

Oliver

Caleb Williams

Wade

Conner Stumm

Mailman Justin

Eric Salazar

Dad

Michael Yezerski

Original Music Composer

Tyler Davidson

Producer

Josh Ethier

Editor

Casper Kelly

Director, Writer

J.D. Lifshitz

Producer

Raphael Margules

Producer

Tony Villaflor

Sound Re-Recording Mixer

Mac Smith

Sound Designer, Supervising Sound Editor

Gideon Tadmor

Executive Producer

Zach Kuperstein

Director of Photography

Drew Sykes

Producer

Marlowe Taylor

Sound Mixer

Jamie King

Writer

Dexter Braff

Executive Producer

Kevin Flanigan

Executive Producer

Tracy Rosenblum

Producer

Emilio Schenker

Executive Producer

Adam J. Wilde

Executive Producer

Roberto Linck

Executive Producer