Trailer
Cast
Tristan Borders
Oliver
Sergey Zhuravsky
Buddy the Unicorn (suit)
Madison Polan
Hannah
Bryson JonSteele
Derek
Clint Howard
George
Patton Oswalt
Strappy (voice)
Noah Pierre D.
Jakson (uncredited)
Eric Salazar
Grilling Man
Michael Shannon
Willie (voice)
Devon Hawkes Ludlow
Charlie the Train (voice)
Seamus Flynn
Timothy
Luke Speakman
Josh
Keegan-Michael Key
Buddy the Unicorn (voice)
Phuong Kubacki
Nurse Nancy
Caleb Williams
Wade
Cristin Milioti
Grace
Delaney Quinn
Freddy
Eric Bauza
Mr. Mailbox / Worry Well / Couchy / Trashy / Pee Flower (voice)
Jonathan Yurco
Dark Buddy (suit)
Mark Aaron Buerkle
Therapist (Day Player)
Tory J. Malone
Tyler
Brooke Bloom
Dr. Deborah Burr
Cedwan Hooks
Betty Bunny (suit)
Rachel Appelbaum
Clocky / Mr. Mailbox (uncredited)
Jimmica Collins
Betty Bunny (voice)
Topher Grace
Ben
Bennie Taylor
Mailman Miles