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Supergirl Milly Alcock says speaking Kryptonian was harder than High Valyrian in House of the Dragon

Supergirl herself, Milly Alcock, isn't a stranger to speaking fictional languages thanks to her time on House of the Dragon

An image from Supergirl — Image credit: DC Studios

News by Jules Chin Greene, Staff Writer

Published on Tue Jun 02 2026

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Milly Alcock is no stranger to speaking in fictional languages. On House of the Dragon, she spoke High Valyrian in numerous scenes with Matt Smith while playing Rhaenyra Targaryen. And in the upcoming Supergirl movie, she speaks Kryptonian, the language of the people from Krypton, in scenes with David Krumholtz, who plays Zor-El. Was speaking Kryptonian in Supergirl more difficult than speaking High Valyrian in House of the Dragon? On the DC Studios Showcase podcast, Milly Alcock revealed that yes, it was.

"I think the content within the scene was really difficult. It's a very emotional scene with me and David [Krumholtz]... And bless him, he had like so much dialogue. Like pages and pages, like half a page of just like a monologue in... Kryptonese? Kryptonian?" Alcock revealed. (It's Kryptonian, by the way.) "And he was really struggling on the day, and then the crew had to draw up these cue cards and run around behind him while we were shooting and just move them. And he also had to keep his eye line at me, and it was such a song and a dance, but it worked."

David Krumholtz isn't the first actor playing a character within the House of El to use cue cards while filming scenes in a Super-Family film. In the 1978 Superman movie, Marlon Brando used cue cards while filming scenes as Clark's biological father, Jor-El. So why should Zor-El, Jor-El's brother, be any different? Acting is hard, folks! (Of course, Brando was speaking his native tongue of English the whole time, but still.)

We'll see Alcock and Krumholtz speaking Kryptonian when Supergirl hits theaters on June 26, 2026.

Whether you're looking for truth or justice ahead of DC Studios' Supergirl movie, we have everything you need to know. Here are:

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Jules Chin Greene: Jules Chin Greene is a journalist and Jack Kirby enthusiast. He has written about comics, video games, movies, and television for sites such as Nerdist, AIPT, and Multiverse of Color.