Supergirl took over CCXP Mexico on Sunday with Milly Alcock and director Craig Gillespie appearing at the Warner Bros. Pictures panel to tease what fans can expect from the upcoming DC Studios movie.
The panel also included a sneak peek from the film, with Gillespie revealing the footage showed an early sequence where Kara Zor-El gets to use her powers for the first time in the movie.
Milly Alcock Says Supergirl Is Messy And Surprising
Alcock said the role stood out to her because Kara is not the usual clean-cut superhero.
She described Supergirl as “messy” and “surprising,” with the character bringing a more complicated energy to the DCU. Gillespie agreed, calling Kara a complex, flawed character who is unapologetic and easy to root for.
Gillespie said Alcock was a major reason he wanted to make the movie, praising her performance and the way she carries the story.
Kara Is Dealing With Trauma
Alcock also explained what makes this version of Supergirl different from other heroes audiences have seen before.
According to Alcock, Kara is carrying major trauma after losing everyone and everything she knew. Rather than dealing with it in a healthy way, Kara is using escape, drinking, and distraction as a way to get through it.
Alcock said Kara is trying to find her place in the universe, but also trying to figure out who she is.
Craig Gillespie Praises Milly Alcock’s Performance
Gillespie praised Alcock’s ability to balance humor and drama, which he said is a difficult tone to pull off.
He also revealed the movie features five languages, including Kryptonian. Gillespie pointed to a three-and-a-half-minute scene between Kara and her father as one of Alcock’s standout moments, saying her performance gave him chills on set.
Alcock returned the praise, saying she trusted Gillespie and described him as open, warm, and willing to try things.
Krypto Is Kara’s Link To Her Past
The panel also touched on Krypto, who appears to have a major emotional role in the movie.
Alcock said Krypto is Kara’s “whole universe” and serves as her anchor to her family and past life. With Kara having lost her people and her home, Krypto becomes one of the few remaining connections to everything she once knew.
Woman Of Tomorrow Comic Inspires The Movie
Gillespie confirmed the film is based on Tom King’s Supergirl: Woman of Tomorrow, with art by Bilquis Evely.
The director said he was immediately drawn to the comic’s rich visual style. He specifically mentioned the “space bus” sequence from the comic as something that caught his attention and influenced the movie.
Big Practical Action Scene Teased
Gillespie and Alcock also teased a major action sequence filmed at Leavesden Studios in London.
The scene was shot on the studio’s largest stage and involved a full city square build. Gillespie said Jason Momoa gets to ride a motorcycle through the sequence, while the production also used practical elements including tanks flying through the air and fire.
Alcock joked that the scene took longer than Gillespie first remembered, saying they spent around six weeks on that stage.
Sneak Peek Shows Kara Using Her Powers
Fans at the Thunder Stage saw a sneak peek from the movie, and Gillespie offered a brief description of the footage.
He said the scene takes place early in the film and shows Kara using her powers for the first time. He added that Kara is emotionally in an angry place during the scene, which gives the moment more intensity.
Gillespie said the footage played well with the crowd.
Release Info
Supergirl opens in theaters and IMAX across North America on June 26, 2026, and begins rolling out internationally on June 24, 2026.
The cast also includes Matthias Schoenaerts, Eve Ridley, David Krumholtz, Emily Beecham, David Corenswet, and Jason Momoa.
