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