Buddy

Keegan-Michael Key

Buddy / Dark Buddy (voice)

Delaney Quinn

Freddy

Tristan Borders

Oliver

Madison Skyy Polan

Hannah

Caleb Williams

Wade

Cristin Milioti

Grace

Topher Grace

Ben

Patton Oswalt

Strappy (voice)

Michael Shannon

Willie (voice)

Clint Howard

George

Bennie Taylor

Mailman Miles

Phuong Kubacki

Nurse Nancy

Jimmica Collins

Betty Bunny / Scared Flower (voice)

Seamus Flynn

Timothy

Bryson JonSteele

Derek

Brooke Bloom

Dr. Deborah Burr

Tory J. Malone

Tyler

Eric Bauza

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