Grace VanderWaal Susan "Stargirl" Caraway

Graham Verchere Leo Borlock

Karan Brar Kevin Singh

Maximiliano Hernández Mr. Robineau

Darby Stanchfield Gloria Borlock

Giancarlo Esposito Archie Brubaker

Collin Blackford Benny Burrito

Annacheska Brown Tess Reed

Shelby Simmons Hillari Kimble

Allison Wentworth Dori Dilson

Juliocesar Chavez Alan Ferko

Artemis Mallory Franklin

Julia Flores Summer

Gabriella Surodjawan Kim

John Apolinar Wayne Parnell

Alex James Zack James

Enzo De Angelis Leo Age 8

Cayman Guay Cool Girl

Sara Arrington Ana Caraway

Lucinda Marker Principal Sutters

Hannah Kauffmann Band Leader

Gavin White Big Kid #1

Sean Dennis Big Kid #2

David Trujillo Big Kid #3

Troy Brookins Ron Kovac

Ryan Begay Mud Frog Fan

Damian O'Hare Leo's Dad

Audra Charity Emcee

Atharva Verma Kevin Age 8

Jimmy E. Jones Teacher

Orion Carrington Young Male Teacher

Tom Sons EMT

Eric Archuleta Athletic Trainer

Rebecca Ann Arscott Keyboard Player: Winter Dance Band

Herve Gaspard Lead Singer / Guitar: Winter Dance Band

Paul Palmer III Drummer: Winter Dance Band

Artha Meadors Bass: Winter Dance Band

Armando Arellano Mudfrogs Marching Band

Victor Armijo Mudfrogs Marching Band

Andrew Blair Mudfrogs Marching Band

Vincent Conte Mudfrogs Marching Band

Giselle Gruz Mudfrogs Marching Band

Oscar Gamboa Mudfrogs Marching Band

Edgar Hernandez Mudfrogs Marching Band

Gabe Hicks Mudfrogs Marching Band

Chris Kingswadd Mudfrogs Marching Band

Shannon Latham Mudfrogs Marching Band

Julio Quiroz Lopez Mudfrogs Marching Band

Spenser Lotz Mudfrogs Marching Band

Gus Pedrotty Mudfrogs Marching Band

Isiah Rojas Mudfrogs Marching Band

Alla Shapiro Mudfrogs Marching Band

Jeanette Silva Mudfrogs Marching Band

Kayla Strickler Mudfrogs Marching Band

David Hight Speech Competition Attendee / Ball Game Attendee (uncredited)

Jesse Mattson Football Player (uncredited)

J. Nathan Simmons Fan (uncredited)

Michael E. Stogner Fan (uncredited)

Ian Willoughby Football Player (uncredited)

Shylo Molina Talent Show Magician (uncredited)

Alexander Alayon Jr. High Schooler (uncredited)

Braden Wilcox High School Student (uncredited)