Apr 14, 2026 6:42pm PT

‘Supergirl’ CinemaCon Footage: Milly Alcock Learned 5 Alien Languages, Trained an Hour Each Day to Play Kara Zor-El

Brent Lang, Rebecca Rubin

DC’s “Supergirl” made a heroic stop at CinemaCon in Las Vegas, where the annual convention for movie theater owners is currently taking place.

“House of the Dragon” actor Milly Alcock stars in “Supergirl” as Kara Zor-El, aka the Girl of Steel. And in new footage that DC debuted on Tuesday, she more than lives up to that moniker with Kara Zor-El battling a band of fearsome pirates who eject her into deep space only to find out they messed with the wrong super-powered do-gooder. The entire film is set on other planets. That means there are enough crazy alien characters to fill a “Star Wars” cantina in the space shuttle that Supergirl was traveling in before it was boarded by bandits. “Maybe give us all a break from that hookah thingy,” Supergirl says dismissively to one alien who won’t stop hitting his pipe on their endless journey.

“I, Tonya” filmmaker Craig Gillespie is directing the film, which is slated to release in theaters on June 26. He praised Alcock for her commitment to the role, noting that she learned five (comic book) languages to play the role (the footage he shared has Supergirl communicating with one creature in a series of clicking noises). That exchange was played for laughs. However, Gillespie was particularly impressed that Alcock was able to pull off dramatic scenes with her parents while speaking Kryptonian.

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He also noted that every day before shooting even started, Alcock would train for an hour so she could pull off the film’s elaborate stunts. “It was so much fun,” Alcock enthused.

DC Studio’s co-chairman James Gunn, who was shooting “Man of Tomorrow” and couldn’t make it to Vegas, has teased in the past that “Supergirl” is “much more hardcore” than prior iterations of the character, who is Superman’s cousin. The story follows Supergirl as she travels through the cosmos with her trusty pup, Krypto the Superdog, to make a name for herself away from her heroic relative. After encountering an alien girl named Ruthye, who is hellbent on avenging the death of her father, Supergirl joins the fight for justice. Ruthye, who grasps a sword that she refuses to surrender to the pirates, clearly looks up to our plucky heroine.

In addition to Alcock, the cast includes Matthias Schoenaerts, Eve Ridley, David Krumholtz, Emily Beecham and Jason Momoa as the alien bounty hunter Lobo. Momoa is no stranger to DC, having previously portrayed Aquaman for the studio. He joked that 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.

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

“Supergirl” is the second project in Gunn and Safran’s newly rebooted DC Universe, following last year’s hit “Superman,” starring David Corenswet as the Man of Steel and Rachel Brosnahan as Lois Lane. Also coming this fall is the body horror movie “Clayface,” about the shape-shifting Batman villain. It will release in theaters on Oct. 23.

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'Supergirl' CinemaCon Footage: Milly Alcock Learned 5 Alien Languages, Trained an Hour Each Day to Play Kara Zor-El