House of the Dragon’s Milly Alcock has stormed into the DC Universe with a fiery Superman cameo, leaving fans in awe and memes in overdrive. The 24-year-old actress, known for portraying Rhaenyra Targaryen in the Game of Thrones prequel, steals a scene at the end of James Gunn’s Superman when Kara Zor-El bursts into the Fortress of Solitude after an intergalactic binge to collect her dog, Krypto.
Alcock’s party-girl energy, highlighted by her viral Golden Globes clip in 2023, sparked fan theories that her casting was inspired by that night. Gunn confirmed he saw her “edge, grace, and authenticity” long before casting her as Supergirl in January 2024. With Supergirl: Woman of Tomorrow set for a June 26, 2026 release, Alcock is poised to reshape DC’s next era.
Quick Read:
- House of the Dragon’s Milly Alcock makes a cameo as Supergirl in James Gunn’s Superman film.
- Fans believe Alcock’s casting was inspired by her viral, tipsy Golden Globes moment in 2023.
- Supergirl: Woman of Tomorrow is set for a theatrical release on June 26, 2026.
Fans Applaud Milly Alcock’s Scene-Stealing Superman Cameo
Alcock’s brief yet electrifying appearance in Superman has earned waves of praise from DC fans. Social media is flooded with comments celebrating her playful yet confident take on Kara Zor-El. Many viewers believe her viral Golden Globes moment perfectly matches Supergirl’s spirited personality.
Let’s read a few fans’ comments:
I had my doubts, but after seeing Supergirl’s cameo in Superman I think she’s gonna do a great job in the role pic.twitter.com/2w7TcQQyVT
— Asinine (@asinineorganism) July 10, 2025
When’s the Supergirl movie cuz her cameo in Superman was so funny like I’m ready I need the trailer nowww pic.twitter.com/JNEMmYUDcu
— ✧89 noches de otoño✧ (@Bayunkada) July 12, 2025
milly alcock at the golden globes drunk and silly is so kara-coded 😭 perfect supergirl casting imo pic.twitter.com/f4YQix6InA
— best of milly alcock (@millysource) July 14, 2025
they saw this clip and knew that she’s the supergirl 😂
— aleyaaaaa (@adelaideelz) July 15, 2025
they saw milly alcock drunk at the golden globes and knew that was supergirl https://t.co/QxqkEgg2JJ
— clare 🐉 (@moethelawn76) July 15, 2025
david corenswet calling milly alcock “cuz” is the cutest thing ever pic.twitter.com/EGtAq7CakX
— dav saw superman! (@vigilantsummers) July 10, 2025
Milly Alcock como supergirl, em superman 2025🤏🏽😮💨 pic.twitter.com/lOePicH71c
— AEMOND ONE EYE (@targaryen171) July 10, 2025
The now-iconic clip showed Alcock laughing with Emma D’Arcy while accepting the award for Best Drama Series in 2023. While the viral moment was fun, it was Alcock’s performance in House of the Dragon that convinced Gunn to choose her. Gunn shared,
Well over a year ago, when I had only read the comics, I was watching House of the Dragon & thought she might have the edge, grace, and authenticity we needed for the DCU’s Supergirl. And now here we are. Life is wild sometimes.
Her seamless energy in the Fortress of Solitude scene, alongside Krypto, has fans convinced she’s the ideal choice to carry Supergirl: Woman of Tomorrow, proving her charm can hold its own next to Superman.
Alcock’s Supergirl: From wild cameos to Woman of Tomorrow
Following her Superman cameo, Alcock leaned into Supergirl’s mischievous image by sharing a meme of herself lounging at a bar with a cigarette (via on Instagram), captioned, “Supergirl while Metropolis is almost destroyed.” This came shortly after Gunn revealed the first Supergirl poster, showing Kara Zor-El sipping from a paper cup while standing in front of a Superman mural she had vandalized.
The new Supergirl: Woman of Tomorrow movie will follow Kara’s galaxy-spanning adventures alongside Krypto. The synopsis teases:
While celebrating her 21st birthday, Kara Zor-El travels across the galaxy with Krypto, during which she meets the young Ruthye (Eve Ridley) and goes on a ‘murderous quest for revenge’.
The film, set to release on June 26, 2026, promises to introduce a bold, unapologetic take on the character, blending raw humor with fierce heroism.
ALSO READ: Milly Alcock was asked to take acting lessons during early days of House of the Dragon
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