The DC Universe (DCU) is gearing up for an exciting new chapter with the highly anticipated film Supergirl: Woman of Tomorrow, set to hit theaters on June 26, 2026. On March 31, 2025, James Gunn, co-chair and co-CEO of DC Studios, shared a captivating behind-the-scenes photo on X, giving fans a glimpse of actress Milly Alcock as she prepares for her role as the iconic Supergirl, Kara Zor-El. The post, which has since sparked a wave of excitement online, celebrates the legacy of Supergirl while offering a sneak peek into the production of this upcoming superhero epic.
In the image shared by Gunn, Milly Alcock is seen sitting on a couch, deeply engrossed in the Supergirl: Woman of Tomorrow comic book miniseries by Tom King and Bilquis Evely—the very source material that inspired the film. Alcock, known for her breakout role as young Rhaenyra Targaryen in HBO’s House of the Dragon, appears focused and ready to embody the “indomitable” spirit of Kara Zor-El, as described by Gunn in his X post. The photo, credited to Parisa Taghizadeh, captures a quiet moment of preparation, with Alcock’s wavy blonde hair framing her face as she studies the comics that will shape her portrayal of the Girl of Steel.
Gunn’s accompanying caption reads: “Today we celebrate #Supergirl and all her various incarnations. Can’t wait for you to see the latest version, portrayed by the indomitable @millyalcock, in June 2026.” This post has hyped up many DC fans as they are going to see a fresh face play Supergirl.
The film, directed by Craig Gillespie and written by Ana Nogueira, marks Supergirl’s first solo cinematic outing in 40 years and is the second major film in the DCU’s Chapter One: Gods and Monsters slate, following the upcoming Superman movie. Based on the 2021–2022 comic book miniseries, Supergirl: Woman of Tomorrow promises a darker, more complex take on Kara Zor-El than previous iterations. Gunn has described the project as a “big science fiction epic film” that will explore a “hardcore” version of Supergirl, shaped by her traumatic upbringing on a fragment of the destroyed planet Krypton.
Unlike her cousin Kal-El (Superman), who was raised on Earth by loving parents, Kara Zor-El witnessed the destruction of her home and the deaths of those around her for the first 14 years of her life. This harrowing backstory sets the stage for a more jaded and resilient Supergirl, a character Alcock is poised to bring to life with depth and intensity.
The film will also feature a stellar supporting cast, including Matthias Schoenaerts as the villain Krem of the Yellow Hills, Eve Ridley as Ruthye Marye Knoll—a young girl who recruits Supergirl for a quest for revenge—and David Krumholtz and Emily Beecham as Supergirl’s parents. Additionally, Jason Momoa is set to make a cameo appearance as the alien mercenary Lobo, and the super-powered dog Krypto will join Kara on her galactic journey.
Supergirl: Woman of Tomorrow is a key part of James Gunn and Peter Safran’s vision for the DCU, which they describe as a “soft reboot” of the DC Extended Universe (DCEU). Announced in January 2023, the project has been in development since Gunn and Safran took the helm of DC Studios in October 2022. The film’s script, penned by Ana Nogueira, has been praised by Gunn as a “beautiful, star-spanning tale,” and its inclusion of Krypto the Superdog adds a playful element to the otherwise intense narrative.
Filming for the movie began earlier this year, with Gunn confirming the start of production in January 2025. The behind-the-scenes photo shared on March 31 offers a glimpse into the ongoing work at Warner Bros. Studios Leavesden, where the film is being shot. While Alcock’s Supergirl costume has yet to be revealed, reports from outlets like ComicBookMovie note that she is rocking a “cool hairstyle” that hints at her transformation into the iconic superhero.
As production continues, fans are left speculating about whether Alcock might make her first appearance as Supergirl in the upcoming Superman film, set to premiere in July 2025. Gunn has remained tight-lipped on the matter, but the timing of Alcock’s casting announcement—months before Superman began filming—has led to widespread speculation that she could debut alongside her Kryptonian cousin before starring in her own solo adventure. Hopefully this happens but there is already going to be many other superheroes in the SUPERMAN movie so she may not make an appearance in it after all.
For now, the focus remains on Supergirl: Woman of Tomorrow, which promises to deliver a fresh and emotionally charged take on one of DC’s most beloved characters. With Milly Alcock at the helm, supported by a talented cast and crew, the film is shaping up to be a standout entry in the DCU. As James Gunn continues to share updates, fans can look forward to more glimpses of Alcock’s journey as the Girl of Steel, culminating in the film’s release on June 26, 2026.
