Buddy

Cristin Milioti
"Grace"

Delaney Quinn
"Freddy"

Topher Grace
"Ben"

Keegan-Michael Key
"Buddy the Unicorn (voice)"

Michael Shannon
"Charlie the Train / Willie (voice)"

Patton Oswalt
"Strappy (voice)"

Clint Howard
"George (voice)"

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

Madison Polan
"Hannah"

Bryson JonSteele
"Derek"

Mark Aaron Buerkle
"Therapist (Day Player)"

Phuong Kubacki