Choi Seung-yoon

as So-Young

Ethan Hwang

as Dong-Hyun

Dohyun Noel Hwang

as Child Dong-Hyun

Anthony Shim

as Simon

Hunter Dillon

as Harry

Jerina Son

as Mi-Sun

Kang In-sung

as Won-Shik / In-Shik

Choi Jong-ryul

as Grandpa

Lee Yong-nyeo

as Grandma

Kendra Anderson

as Miss Jane

Elizabeth Wainwright Molinares

as Child Ashley

Sawyer Proulx

as Stewart

Sawyer Fraser

as Jimmy

Sara Halliburton

as Nicole

Pavlina Kaye Hladik

as Sarah

Leslie Parmar

as Sundeep

Gabriela Reynoso

as Rosa

Bryce Hodgson

as Larry

Roman Podhora

as Manning

Juan Riedinger

as Doyle

Sean Poague

as Mr. Davis

Eric Keenleyside

as Principal Lafferty

Naomi Simpson

as Mrs. Galloway

Nancy Kerr

as Mrs. Robertson

Vanessa Przada

as Ashley

Ryann Sheridan

as Steph

Lucy Layton

as Lindsay

Aiden Finn

as Eggers

Tristan Ranger

as Jackson

Ryan Robbins

as Mr. Murray

Brianna Kim

as Hyun-Sun

Joshua Morettin

as Pete

Cassandra Sawtell

as Shayla

Emily Lê

as Linh

Wanda Ayala

as Sofia

Jessica Garcie

as Nurse Gomez

John Cassini

as Dr. Rydell

Lag Jun-park

as Barber