Courtney Whitmore (Brec Bassinger) is a high school sophomore whose life takes an unexpected turn when she discovers a powerful staff of cosmic power and learns her step-father Pat (Luke Wilson) used to be the sidekick of famed superhero Starman (Joel McHale). With the staff now in her possession, Courtney decides to inherit Starman's legacy as Stargirl and inspire a new generation of heroes.
Originally announced in 2018 to be streaming exclusively on the DC Universe platform, it was later revealed that Stargirl would also be broadcast on The CW the day after each new episode drops. Additionally, the character will make her debut in the 2019 — 2020 Arrowverse crossover Crisis on Infinite Earths, establishing the show within Earth-2 of that franchise's Post-Crisis multiverse.
Stargirl contains examples of:
- Advertising by Association: The official trailer prominently notes it's from the producers of The Flash, Arrow, Supergirl, and Batwoman.
- Early-Bird Cameo: Stargirl makes her debut in the final scenes of the last episode of the Crisis on Infinite Earths crossover event ahead of the series' official debut. That scene also establishes that the show takes place in Earth-2 of The Multiverse.
- Tragic Keepsake: A signed photo of Starman and Pat from back in the day features in the trailer.