Credit: MovieStillsDB
Published Jun 29, 2026, 9:00 AM EDT
Liz Declan is a Lead Writer for ScreenRant, primarily covering movies. She is a massive fan of Star Wars, the MCU, and Supernatural. In addition to writing, Liz loves attending and covering conventions and interviewing actors. Find her on TikTok and Instagram @va.va.vera
With Supergirl's opening weekend now complete, there's one name that (unsurprisingly) keeps coming to the surface, and that's Milly Alcock. Supergirl was not Alcock's DCU debut, as she had shown up at the very end of Superman to retrieve her dog, Krypto, from David Corenswet's Superman. That didn't show too much about the character, though, other than the fact that she would go to other planets to party and didn't have firm control of her dog. That did give a peek into what was to come for the character and how the DCU was going to portray her, however.
Supergirl made good on that promise, even as Kara/Supergirl's characterization and backstory were deepened considerably in the new movie. At the beginning of this story, Kara is indeed a party girl, escaping her pain and feelings of not fitting in on Earth by going to other planets where A) she can get drunk and B) no one knows her. However, as can be expected in a superhero tale such as this one, that approach to her life has certainly changed by the end of the movie, setting up her return in Superman: Man of Tomorrow.
While fans don't have too long to wait before Alcock returns to the DCU once again, as Man of Tomorrow is slotted for July 2027, many are eager to see the star in something else. Her most well-known role outside of Superman and Supergirl is, of course, as young Rhaenyra Targaryen in House of the Dragon, and in the last 12 years of her career, she hasn't actually racked up a huge filmography. However, one often overlooked 2025 project starring Alcock was absolutely brilliant, and fans looking for more from her should check it out.
Milly Alcock Is Brilliant In Supergirl (And Viewers Seem To Agree)
© Warner Bros. /Courtesy Everett CollectionIt's clear at this point that Supergirl is having a bit of a difficult first week. After various negative reviews of the movie came in, general audiences had a chance to go see the flick as well, and while Supergirl's Rotten Tomatoes scores suggest that audiences overall enjoyed the movie more than many critics did, there were still a host of complaints. Among those issues that critics and audiences have raised are the changes made to Supergirl: Woman of Tomorrow, on which this story is based; the redesign of the villain Krem; the bland color scheme; and various other elements.
Yet, for the most part, critics and audiences seem agreed on one thing: Milly Alcock was great as Supergirl. Granted, this isn't universally true; plenty of people have also voiced dissatisfaction with the Supergirl casting choice, which began long before the movie was released. For many who went into the theater with an open mind about the cast, though, Alcock was one of the bright spots of the movie. Generally, Alcock's ability to portray both messy, party girl Kara in the beginning and then grieving, more nuanced Kara later on made her a standout.
This is also not the first time that Alcock has brought a nuanced character to the screen—far from it. In fact, her 2025 miniseries Sirens not only saw Alcock's acting chops on display yet again, but also revealed a different side to this skill set, wherein she was able to pull off an eerie, unsettling plot line and character.
Sirens Is Among Alcock's Best Projects To Date
Like many shows in the dark comedy genre, Netflix's miniseries Sirens gives viewers the feeling that something is 'off' right from the jump, and that mysteriousness and unease continue throughout the show. In the show, Meghann Fahy's Devon is on a mission to find out what is going on with her young sister, Simone (Alcock), who has started a new job and seems to have a bizarre, borderline unhealthy relationship with her new boss. What ensues is a creepy, intense, compelling story arc that ends in a way that very few, if anyone, saw coming.
Truly, this is Alcock at her very best. Arguably, she actually shines even more in Sirens than she does in Supergirl because the series demands a different level of acting from her—one that is more subtle but also (and this is, of course, subjective) more captivating, especially because of the unusual narrative. As audiences await next year's Man of Tomorrow, Netflix's Sirens is the perfect next watch for fans who want to see more of the star and be reminded that she really is a stellar actress, more than capable of stepping into these superhero shoes.
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