Milly Alcock Trained Extensively to Play Supergirl in Upcoming Film

The 'House of the Dragon' actress learned 5 alien languages and trained for an hour daily for the role.

Apr. 15, 2026 at 1:42am

Got story updates? Submit your updates here. ›

An extreme close-up of gleaming, reflective alien technology with dramatic, high-contrast lighting, conveying a sense of futuristic glamour and spectacle.The visually stunning and technologically advanced world of 'Supergirl' promises an immersive cinematic experience for audiences.Las Vegas Today

At CinemaCon, new footage of the upcoming 'Supergirl' film was unveiled, showcasing the dedication of lead actress Milly Alcock. Alcock, who plays Kara Zor-El, learned five alien languages and trained for an hour each day to prepare for the physically demanding role. Director Craig Gillespie praised Alcock's commitment, noting her ability to deliver dramatic scenes while speaking Kryptonian. The film, which is set primarily on other planets, follows Supergirl as she travels through the cosmos with her dog Krypto, encountering an alien girl named Ruthye who seeks vengeance.

Why it matters

The extensive training and language-learning undertaken by Milly Alcock highlights the level of dedication required to authentically portray a superhero character, especially one set in a science-fiction universe. This dedication is expected to translate to a more immersive and believable performance, which could help the film resonate with audiences and potentially launch a new era for the Supergirl character on the big screen.

The details

In the new footage shown at CinemaCon, Supergirl, played by Milly Alcock, is ejected into deep space by a band of fearsome pirates, only to prove she is more than a match for them. The film features a wide array of alien characters, with Alcock's Supergirl communicating with one creature in a series of clicking noises. Director Craig Gillespie praised Alcock's ability to deliver dramatic scenes while speaking Kryptonian, the fictional language of Supergirl's home planet.

  • Supergirl is slated to release in theaters on June 26, 2026.

The players

Milly Alcock

The Australian actress who stars as Kara Zor-El, aka Supergirl, in the upcoming film.

Craig Gillespie

The director of the Supergirl film, known for his work on I, Tonya.

James Gunn

The co-chairman of DC Studios, who has teased that the new Supergirl film will be 'much more hardcore' than previous iterations of the character.

Ruthye

An alien girl who joins Supergirl in her fight for justice, driven by the desire to avenge her father's death.

Lobo

The alien bounty hunter played by Jason Momoa, who has previously portrayed Aquaman in the DC universe.

Got photos? Submit your photos here. ›

What they’re saying

“Maybe give us all a break from that hookah thingy.”

— Milly Alcock, as Kara Zor-El/Supergirl

“It was so much fun.”

— Milly Alcock

“Supergirl is 'much more hardcore' than prior iterations of the character.”

— James Gunn, Co-Chairman, DC Studios

“If his two heroic characters met, instead of fighting, they'd probably pound a 'few hundred beers' and ask Gunn and DC Studios Co-Chair Peter Safran to put them in a movie together.”

— Jason Momoa, as Lobo

“'Coming to a theater near you in 2031, 'The Aquaman Lobo Movie,'”

— Peter Safran, Co-Chairman, DC Studios

What’s next

The judge in the case will decide on Tuesday whether or not to allow Walker Reed Quinn out on bail.

The takeaway

This case highlights growing concerns in the community about repeat offenders released on bail, raising questions about bail reform, public safety on SF streets, and if any special laws to govern autonomous vehicles in residential and commercial areas.