Josh Gad
Dogs: Bailey / Buddy / Tino / Ellie (voice)

K.J. Apa
Teen Ethan

Britt Robertson
Teen Hannah

Dennis Quaid
Adult Ethan

Peggy Lipton
Adult Hannah

Juliet Rylance
Elizabeth - Ethan's Mom

Luke Kirby
Jim - Ethan's Dad

John Ortiz
Carlos

Kirby Howell-Baptiste
Maya Williams

Pooch Hall
Al

Logan Miller
Todd

Gabrielle Rose
Grandma Fran

Caroline Cave
Ellen - Boss' Wife

Nicole LaPlaca
Wendi

Michael Patric
Sam

Michael Bofshever
Grandpa Bill

Primo Allon
Victor

Kalyn Bomback
Yolanda

Peter Kelamis
Dad's Boss

Jane McGregor
Rachel

Kelly-Ruth Mercier
Atlanta Vet

Kwesi Ameyaw
Cop

Paul Jarrett
Police Lieutenant

Anita Daher
Mother at Shelter

Alicia Johnston
Hysterical Mother

Naomi Frenette
Kidnapped Girl

Bryce Gheisar
Ethan - 8 Years Old

Robert Mann
Delivery Workman

Cory Wojcik
Puppy Mill Owner

Ross Douglas Noble
Puppy Mill Customer

John C. MacDonald
Teammate

Christopher Pearce
Policeman

Dan De Jaeger
Father at Shelter

Aidan Ritchie
Ambulance Attendant

John Bluethner
Professor

Chris Webb
Kidnapper

Dean Mckenzie
Detective

Tom Young
Hardware Store Employee