Joey King as Elle Evans

Joel Courtney as Lee Flynn

Jacob Elordi as Noah Flynn

Molly Ringwald as Mrs. Flynn

Stephen Jennings as Mike Evans

Carson White as Brad Evans

Meganne Young as Rachel

Frances Sholto-Douglas as British Beauty

Nathan Lynn as Yearbook Guy

Byron Langley as Warren

D. David Morin as School Principal

Dan Elijah Rudin as Sneezer

Jessica Sutton as Mia

Michelle Allen as Multi-Pierced Girl

Joshua Daniel Eady as Tuppen

Judd Krok as Ollie

Chase Dallas as Noah Flynn (Age 13)

Celina Caroto as Blonde Popular Girl

Ben Lillie as Geek

Megan du Plessis as Shelly 'Elle' Evans (Age 4)

Caitlyn de Abrue as Shelly 'Elle' Evans (Age 7)

Juliet Blacher as Shelly 'Elle' Evans (Age 11)

Morné Visser as Mr. Flynn

Hilton Pelser as Barry

Zandile Madliwa as Gwyneth

Bianca Bosch as Olivia

Trent Rowe as Biggest Geek in School

Chloe Williams as Joni Evans

Sanda Shandu as Randy

Waldemar Schultz as Mr. Lewis

Evan Hengst as Council President

Robbie Tucker as (uncredited)

Jesse Rowan-Goldberg as Lee Flynn (Age 11)

Lincoln Pearson as Lee Flynn (Age 4)

Michael Miccoli as Noah Flynn (Age 9)