An attempt at an adaptation in 2015, had Joey King and Charlie Plummer starring but it's unknown yet if they remain attached or if they've been recast.
Source: https://www.hollywoodreporter.com/news/ ... irl-822164Published in 2000, the book centers on a homeschooled teenage girl who enrolls in an Arizona high school and through her non-conformity alters the ecosystem of the student body, while at the same time capturing the heart of star-struck boy. But when the student body turns on her, the boy tells her to go against her nature and try to fit in.
Source: http://deadline.com/2018/03/times-up-di ... 202303892/Julia Hart just sealed a deal to helm a feature film version of Stargirl, the young adult novel Stargirl from author Jerry Spinelli which flew off shelves when President Obama bought the book from a Washington D.C. bookstore for his girls in 2015. Stargirl will become one of the first — if not the first — original film for Disney’s new streaming platform. It is also being adapted and produced by a woman. The book is in the late stages of development and being adapted by Kristin Hahn to shoot in the fall. It is being produced by The Gotham Group’s Ellen Goldsmith-Vein and Lee Stollman with Hahn and her production company Hahnscape.