DC Studios has released an exciting teaser for Supergirl, giving fans a first glimpse ahead of the full trailer set to drop on Thursday, December 11.
Australian actress Milly Alcock is capturing the hearts of superhero fans around the world with her exciting new role as Supergirl (Kara Zor‑El) in the upcoming DC Studios film Supergirl: Woman of Tomorrow. Best known for her breakthrough performance in House of the Dragon, Alcock has quickly become one of Hollywood’s most talked‑about young talents. Fans are already buzzing about Alcock’s performance and the film’s distinctive tone. Early teaser footage shows her in both everyday attire and the classic Supergirl costume, hinting at a grounded yet epic narrative that expands the DC Universe in bold new ways.
A Rising Star’s Journey to Stardom
Born on April 11, 2000, in Sydney, Australia, Milly Alcock has emerged as one of the most talented young actresses of her generation. She made her television debut in 2014 and steadily built her career through Australian television, earning critical acclaim for her role as runaway teenager Meg Adams in the Foxtel comedy-drama series “Upright” (2019-2022). For this role, she was nominated for Best Comedy Performer at the 10th AACTA Awards, becoming one of the youngest nominees in the category.
However, Alcock’s breakthrough came when she was cast as young Princess Rhaenyra Targaryen in the first season of HBO’s “House of the Dragon” (2022-2024). Her nuanced and captivating performance earned her a Critics’ Choice Television Award nomination for Best Supporting Actress in a Drama Series, introducing her to millions of viewers worldwide and establishing her as a rising talent to watch.
Landing the Role of Supergirl
In January 2024, DC Studios announced that Milly Alcock had been officially cast as Kara Zor-El / Supergirl in the upcoming film “Supergirl: Woman of Tomorrow.” James Gunn, the head of DC Studios, personally selected Alcock after being impressed by her work in “House of the Dragon.” Gunn stated that Alcock embodied the character exactly as envisioned by comic book writer Tom King, and he described her casting as “one of the best casting decisions I’ve ever made.”
Alcock made her debut as Supergirl in a surprise cameo in James Gunn’s “Superman” (2025), setting up her solo film. After her brief but impactful appearance, Gunn praised her performance, calling her “absolutely breathtaking” and suggesting she may be his finest casting choice to date. The film is currently in post-production, with an expected release in Summer 2026.
A Darker, More Complex Supergirl
“Supergirl: Woman of Tomorrow” is based on Tom King’s acclaimed comic book run, which presents a radically different version of Supergirl. Unlike Superman, who was raised by loving parents on Earth, Kara Zor-El was raised on a piece of the destroyed planet Krypton and watched everyone around her die. This tragic backstory makes her more jaded and cynical than her famous cousin.
In this film, Supergirl embarks on a murderous quest for revenge across the galaxy. James Gunn envisioned the character as “pixie-ish but very attitudional,” and Alcock’s performance seems to capture this complex blend of vulnerability and fierce determination. The cast also includes Matthias Schoenaerts as Krem, Eve Ridley as Ruthye Knoll, and Jason Momoa as the notorious intergalactic anti-hero Lobo.
Beyond Supergirl: Her Recent Successes
Before taking on her most significant role yet, Alcock starred in Netflix’s dark comedy limited series “Sirens” (2025), alongside Julianne Moore and Meghann Fahy. In the series, she plays Simone DeWitt, a woman whose seemingly perfect life quickly unravels when her sister unexpectedly arrives and secrets begin to surface.
Her performance in “Sirens” showcased her range as an actress, earning her critical acclaim and proving that she can hold her own against established Hollywood names. This success further solidified her reputation as one of the most talented young actresses in the industry.
The Future of Supergirl
Milly Alcock’s casting as Supergirl represents a bold new direction for DC’s female superheroes. By choosing a relatively unknown international actress over established Hollywood names, James Gunn is prioritizing talent and authenticity over star power, a decision that could set a new standard for superhero casting.
As fans eagerly await the release of “Supergirl: Woman of Tomorrow” in 2026, Milly Alcock stands on the cusp of superstardom. Her journey from Sydney-based television actress to leading a major DC Studios film is a testament to her incredible talent and dedication. With James Gunn’s endorsement and her proven ability to captivate audiences, Alcock is poised to redefine what it means to be Supergirl and become a major force in superhero cinema.
