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

Alicia Johnston

Hysterical Mother

Naomi Frenette

Kidnapped Girl

Brooke Warrington

Bree

Bryce Gheisar

Ethan - 8 Years Old

Robert Mann

Delivery Workman

Cory Wojcik

Puppy Mill Owner

Dan De Jaeger

Father at Shelter

Aidan Ritchie

Ambulance Attendant

John Bluethner

Professor

Paul Griggs

Hot Dog Vendor

Chris Webb

Kidnapper

Dean Mckenzie

Detective