- For the episode titled Stargirl, see "Stargirl" .
- For the next season of Stargirl, see "Summer School: Chapter One" .
STARGIRL follows high school sophomore Courtney Whitmore as she inspires an unlikely group of young heroes to stop the villains of the past. This new drama reimagines Stargirl and the very first superhero team, the Justice Society of America, in an unpredictable series. STARGIRL is lovingly inspired by Johns' late sister, who was killed in a plane accident.
- Brec Bassinger as Stargirl (Courtney Whitmore)
- Yvette Monreal as Wildcat (Yolanda Montez)
- Anjelika Washington as Dr. Mid-Nite (Beth Chapel)
- Cameron Gellman as Hourman (Rick Tyler)
- Trae Romano as Mike Dugan
- Jake Austin Walker as Henry King Jr, (season 1)
- Hunter Sansone as Cameron Mahkent
- Meg DeLacy as Shiv (Cindy Burman)
- Neil Jackson as Icicle (Jordan Mahkent) (season 1)
- Christopher James Baker as Brainwave (Henry King Sr.) (season 1)
- Amy Smart as Barbara Whitmore
- Luke Wilson as S.T.R.I.P.E. (Pat Dugan)
- Nick Tarabay as Eclipso (season 2)
- Stargirl is the first DC Universe show to also air on The CW.
- Episodes aired of DC Universe are longer than those aired on The CW.