Josh Gad

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

KJ Apa

Teen Ethan

Britt Robertson

Teen Hannah

Juliet Rylance

Elizabeth - Ethan's Mom

Luke Kirby

Jim - Ethan's Dad

John Ortiz

Carlos

Kirby Howell-Baptiste

Maya Williams

Pooch Hall

Al

Bryce Gheisar

Ethan - 8 Years Old

Dennis Quaid

Adult Ethan

Peggy Lipton

Adult Hannah

Logan Miller

Todd

Gabrielle Rose

Grandma Fran

Michael Bofshever

Grandpa Bill

Peter Kelamis

Dad's Boss