Cristin Milioti
Grace
Delaney Quinn
Freddy
Topher Grace
Ben
Keegan-Michael Key
Buddy the Unicorn (voice)
Michael Shannon
Charlie the Train (voice)
Patton Oswalt
Strappy (voice)
Clint Howard
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
Lynette Eklund
Puppeteer
Tory Jacqui Malone
Tyler
Rachel Appelbaum
Clocky / Mr. Mailbox
Cedwan Hook
Betty Bunny Puppeteer
Jonathan Yurco
Dark Buddy
Frank Brown Jr.
Father
Crew
