Nick Robinson as Simon Spier

Logan Miller as Martin Addison

Alexandra Shipp as Abby Suso

Katherine Langford as Leah Burke

Jorge Lendeborg Jr. as Nick Eisner

Jennifer Garner as Emily Spier

Josh Duhamel as Jack Spier

Talitha Eliana Bateman as Nora Spier

Keiynan Lonsdale as Abraham 'Bram' Greenfeld

Tony Hale as Mr. Worth

Natasha Rothwell as Ms. Albright

Miles Heizer as Cal Price

Joey Pollari as Lyle

Clark Moore as Ethan

Drew Starkey as Garrett Laughlin

Mackenzie Lintz as Taylor

Cassady McClincy-Zhang as Jackie

Alex Sgambati as Claire

Terayle Hill as Spencer

Haroon Khan as Suraj

Tyler Chase as Aaron

Jamila Thompson as Additional Posse Girl

Patrick Donohue as Math Teacher

Nicholas Stargel as Fantasy Teen

Nancy De Mayo as Mrs. Eisner

Christian Ojore Mayfield as Mr. Eisner

Chantell D. Christopher as Mrs. Suso

Mandy Fason as Mrs. Burke

Philip Covin as Mr. Burke

Campbell Godfrey as Little Man

Emily Jordan as Creekwood Girl

Joshua Mikel as Ride Operator

Robbie Rogers as The Coach

Christopher L. Plunkett as Dancer

Jessi Peralta as Dancer

Carsen Rowe as Dancer

Jonathan Fritschi as Dancer

Matthew Laraway as Dancer

Dylan Cheek as Dancer

Jaidi Ventura as Dancer

Danni Heverin as Dancer

David Copeland Brown Jr. as Tyler (uncredited)

Bryson Pitts as 10-Year-Old Simon Spier (uncredited)

Nye Reynolds as 5-Year-Old Simon Spier (uncredited)

Skye Mowbray as 6-Year-Old Nora Spier (uncredited)

Samantha Bulka as Ethan's Posse (uncredited)

Baz Ma as Ethan's Posse (uncredited)

Natalia Tureta as Ethan's Posse (uncredited)

Briana Estevez as Cheerleader (uncredited)

Jönah-Blainé Bowling as Trendy Jock (uncredited)

Sean O'Donnell as High School Student (uncredited)

Collin McHugh as High School Student (uncredited)

Abigail Houck as High School Student (uncredited)

Jodi Houck as Parent (uncredited)

Josh Royston as Parent (uncredited)

Tyson Love as Football Parent (uncredited)

Jordan Doww as High School Student (uncredited)