Milly Alcock embraces fear taking on DC’s Supergirl role

Milly Alcock said taking on DC’s Supergirl role brought a new kind of fear, calling it “this new gift of learning to accept the fear.” The film reached theaters worldwide on June 26, 2026, turning the 24-year-old actress into the latest young performer asked to carry a major franchise on the strength of one breakout role.

Alcock was cast in January 2024 after a screen test for DC Studios co-chiefs James Gunn and Peter Safran. Her arrival mattered because it came so soon after HBO’s House of the Dragon made her a global name as young Rhaenyra Targaryen, and because Supergirl sits at the center of Gunn and Safran’s rebooted DC Universe.

The project is built from Tom King and Bilquis Evely’s 2021 comic limited series Supergirl: Woman of Tomorrow. Craig Gillespie directed from a screenplay by Ana Nogueira, with Warner Bros. Pictures handling the release. DC’s version of Kara Zor-El is not the bright, familiar cousin of Superman. The studio’s character description casts her as more jaded and life-weary, a heroine searching for purpose and for a clear definition of what it means to be one.

That darker framing has made Alcock’s casting a test case for how franchise Hollywood now handles scrutiny around women leading superhero films. Alcock has said she was aware of backlash aimed at women in those roles, but that she could not control other people’s reactions and had to keep moving forward. In that sense, Supergirl was not just another studio job. It was a pressure chamber, with Alcock moving from one fandom juggernaut into another while the expectations only grew louder.

The preparation reflected that weight. Alcock trained for an hour a day and learned five alien languages for the part, details that match the film’s hard-edged approach to Kara’s world. Early press reactions from screenings praised Alcock’s performance and Jason Momoa’s Lobo, while also describing the movie as leaning into a tougher, more Mad Max-style tone.

That tonal shift fits the larger strategy behind DC Studios’ reset. Supergirl opened as part of the company’s broader attempt to define a new generation of heroes under Gunn and Safran, with Alcock positioned not as a safe choice but as an actor asked to carry a more battered, less forgiving version of the Woman of Steel.