Josh Gad

Character: Dogs: Bailey / Buddy / Tino / Ellie (voice)

KJ Apa

Character: Teen Ethan

Britt Robertson

Character: Teen Hannah

Dennis Quaid

Character: Adult Ethan

Peggy Lipton

Character: Adult Hannah

Juliet Rylance

Character: Elizabeth - Ethan's Mom

Luke Kirby

Character: Jim - Ethan's Dad

John Ortiz

Character: Carlos

Kirby Howell-Baptiste

Character: Maya Williams

Pooch Hall

Character: Al

Logan Miller

Character: Todd

Gabrielle Rose

Character: Grandma Fran

Caroline Cave

Character: Ellen - Boss' Wife

Nicole LaPlaca

Character: Wendi

Michael Patric

Character: Sam

Michael Bofshever

Character: Grandpa Bill

Primo Allon

Character: Victor

Kalyn Bomback

Character: Yolanda

Peter Kelamis

Character: Dad's Boss

Jane McGregor

Character: Rachel

Kelly-Ruth Mercier

Character: Atlanta Vet

Kwesi Ameyaw

Character: Cop

Paul Jarrett

Character: Police Lieutenant

Anita Daher

Character: Mother at Shelter

Alicia Johnston

Character: Hysterical Mother

Naomi Frenette

Character: Kidnapped Girl

Brooke Warrington

Character: Bree

Bryce Gheisar

Character: Ethan - 8 Years Old

Robert Mann

Character: Delivery Workman

Ron Verwymeren

Character: Delivery Workman

David J. Lyle

Character: Country Vet

Cory Wojcik

Character: Puppy Mill Owner

Ross Douglas Noble

Character: Puppy Mill Customer

Andrew W. Nolan

Character: Football Coach

Jordan Butterill

Character: Teammate

John C. MacDonald

Character: Teammate

Brent Holtzman

Character: Police Captain

Christopher Pearce

Character: Policeman

Violet Haas

Character: Elderly Woman

Darcy Higginbotham

Character: Farm Hand

Danesha Lee

Character: Animal Control Officer

Dan De Jaeger

Character: Father at Shelter

Reine Lecuyer

Character: Daughter at Shelter

Rayna Ens-Armstrong

Character: Daughter at Shelter

Mackenzie Thornton

Character: Tweener Girl

Avery Thompson

Character: Tweener Girl

Aidan Ritchie

Character: Ambulance Attendant

Kenyan Alexander Walcot

Character: Ty - 5 Years Old

Treyton Augustus Walcot

Character: Richie - 4 Years Old

John Bluethner

Character: Professor

James Janssens

Character: Alzheimer's Patient

Paul Griggs

Character: Hot Dog Vendor

Grant Burr

Character: Hardware Store Clerk

Ronald Boyd Johnson

Character: Neighbor

Chris Webb

Character: Kidnapper

Evan Martin

Character: Punk Boy

Tyson Wagner

Character: Boyfriend in Park

Dean Mckenzie

Character: Detective

Tom Young

Character: Hardware Store Employee