cast
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Grace VanderWaal
Susan "Stargirl" Caraway
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Graham Verchere
Leo Borlock
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Karan Brar
Kevin Singh
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Maximiliano Hernández
Mr. Robineau
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Darby Stanchfield
Gloria Borlock
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Giancarlo Esposito
Archie Brubaker
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Collin Blackford
Benny Burrito
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Annacheska Brown
Tess Reed
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Shelby Simmons
Hillari Kimble
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Allison Wentworth
Dori Dilson
- Juliocesar Chavez Alan Ferko
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Artemis
Mallory Franklin
- Julia Flores Summer
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Gabriella Surodjawan
Kim
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John Apolinar
Wayne Parnell
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Alex James
Zack James
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Enzo De Angelis
Leo Age 8
- Cayman Guay Cool Girl
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Sara Arrington
Ana Caraway
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Lucinda Marker
Principal Sutters
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Hannah Kauffmann
Band Leader
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Gavin White
Big Kid #1
- Sean Dennis Big Kid #2
- David Trujillo Big Kid #3
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Troy Brookins
Ron Kovac
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Ryan Begay
Mud Frog Fan
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Damian O'Hare
Leo's Dad
- Audra Charity Emcee
- Atharva Verma Kevin Age 8
- Jimmy E. Jones Teacher
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Orion Carrington
Young Male Teacher
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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)
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J. Nathan Simmons
Fan (uncredited)
- Michael E. Stogner Fan (uncredited)
- Ian Willoughby Football Player (uncredited)
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Shylo Molina
Talent Show Magician (uncredited)
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Alexander Alayon Jr.
High Schooler (uncredited)
- Braden Wilcox High School Student (uncredited)