David Corenswet's Superman will have a much larger presence in Supergirl than many fans anticipated, with director Craig Gillespie revealing that the Man of Steel serves as a key influence on Kara Zor-El's journey throughout the film. According to Gillespie, Superman is far more than a brief cameo.
Multiple Appearances and Flashbacks
The film features multiple appearances from Corenswet, including flashbacks exploring Kara's arrival on Earth and her early interactions with her famous cousin. One sequence reportedly shows Superman helping Kara adjust to life on Earth and overcome the language barrier between them.
Superman as a Moral Guide
While Supergirl remains firmly centred on Milly Alcock's Kara Zor-El, Superman acts as a moral guide throughout the story. Gillespie described the pair's relationship as having an “older sibling” dynamic, with Clark Kent attempting to patiently support Kara as she struggles to find her place in the universe.
The film follows Kara on an intergalactic adventure after a young alien girl, Ruthye Marye Knoll, seeks her help avenging her family. Along the way, Supergirl confronts her own trauma and questions what kind of hero she wants to become, with Superman serving as a reminder of the ideals she has yet to embrace.
On-Set Collaboration and Improvisation
Alcock recently praised Corenswet's support during production, particularly while tackling the film's fictional languages and emotionally demanding scenes. Gillespie also revealed that Corenswet improvised several of his lines, helping to create a natural and believable bond between the Kryptonian cousins.
Source Material and Future DC Universe
The movie is based on the acclaimed Supergirl: Woman of Tomorrow comic series and stars Alcock alongside Eve Ridley, Matthias Schoenaerts and Jason Momoa as Lobo. Early reports suggest the film will help lay the groundwork for future DC Universe projects, including the upcoming Man of Tomorrow, which will reunite Supergirl and Superman on screen.
Supergirl opens in cinemas on June 26, 2026.
