Milly Alcock recalls her feelings when she suited up in the Supergirl costume for a screen test

While Supergirl is still a year away, the movie completed filming almost a year ago, in May 2025. An adaptation of Tom King's acclaimed 2021 mini-series, consisting of eight issues titled "Supergirl: Woman of Tomorrow," the movie will be headlined by House of the Dragon's Milly Alcock as the titular character, and even more, it will also see Jason Momoa return to the DC Universe, but this time as Lobo.

Directed by Craig Gillespie, the movie was announced as a part of the DCU's first chapter, which is titled "Chapter One: Gods and Monsters." Now that the filming is complete and the post-production work is in progress, Milly Alcock extensively spoke about playing Supergirl/Kara Zor-El in the movie in the June 2025 interview with Elle magazine.

Here, the 25-year-old actress revealed her initial reaction to getting cast as Kara Zor-El in the movie was one of disbelief and fear.

Explaining Milly Alcock's Supergirl comments:

As mentioned before, Milly Alcock was interviewed by Elle for its June 2025 issue. In that interview, the House of the Dragon actress touched upon her roles in Sirens (available on Netflix) and Supergirl. The young Australian actress revealed that upon receiving Gunn's text stating that she was selected to play the DC hero, she felt disbelief. Her exact words were

“I was kind of in disbelief. I was initially like, ‘What have I done?’ I then invited all my friends over to the house and we drank champagne.”

Then the actress revealed what she felt ten days before she got that text, when she was screen testing for the role. Alcock revealed that she had never been screen tested for a role before and then went on to say:

“During a screen test, you’re in a room with all the other women [vying for the same part] and you’re all dressed as the character. [The studio] will get you lined up in the makeup truck and put the same makeup on you all and then test you on a stage. For Supergirl, it was myself and another girl. It was really scary; I thought I was going to vomit! But it’s just fear! That’s what happens! This job has been a journey of overcoming my own fear.”

While some might take her comment about vomit out of context, we must take into account the context she used the word. The actress simply meant that she felt anxious about playing the titular character in a legacy franchise with a huge and sometimes even toxic fan following. The actress clearly had a more positive experience playing the Man of Steel's Kryptonian cousin in the DCU.

The Supergirl movie received a massive update this week:

DC Studios Co-CEO James Gunn was interviewed by Rolling Stone, which was published on June 16, 2025. In this interview, Gunn discussed a wide range of topics, including Superman, the DCU Batman, and even Matt Reeves' version of the Caped Crusader. But Gunn also revealed that the 2026 DCU movie headlined by Milly Alcock's Kara is dropping the "Woman of Tomorrow" subtitle.

When the Rolling Stone interviewer asked Gunn if the movie is retaining the "Woman of Tomorrow" subheading, the filmmaker said:

"I think it’s just called Supergirl."

While some may find this move surprising, some have noted that this movie is similar to Gunn's own Superman. When the DCU Man of Steel's solo movie was announced, the movie was titled "Superman: Legacy." However, the word "Legacy" was dropped from the title as soon as the movie began filming. The same thing happened with Kara Zor-El's movie as well.