Milly Alcock’s popularity has surged once again, making her massively popular Netflix series,Sirens, a must-watch.Milly Alcock rose to prominence in her unforgettable role in theGame of Thronesprequel seriesHouse of the Dragon. She’s now bigger than ever, with the tremendoussuccess of James Gunn’sSuperman.
The 25-year-old actress is one of the latest in a long line of young movie stars to take on a superhero role, and she’ll be making herfilm star debut as Supergirlin the eponymous 2026 movie. While waiting out the upcoming year, she has other exciting projects for fans to dive into.

With Milly Alcock’s Popularity Rising With Her Supergirl Role, Don’t Miss Her In Sirens
Sirens Is One Of Milly Alcock’s Best Projects Yet
Milly Alcock’s popularity surged afterHouse of the Dragon, and though we didn’t hear from her much for a while after that, she’s had a massive year in 2025. Just months beforeSuperman, she starred in a Netflix series calledSirens. Itonly has a 75% from critics on Rotten Tomatoes, but audiences evidently felt strongly about it
The show remained at the top of the streaming service’s charts for weeks, andnew data revealed that it’s already the #8 Netflix show of 2025’s first half, competing against shows that had much more time on the platform to accumulate views. It’s also behind juggernauts likeSquid GameandAdolescence.

With only five episodes,Sirensis an approachable, binge-worthy series featuring addictive mysteries, enjoyable humor, fantastic acting performances, and engrossing thematic material. Most importantly, for fans of Milly Alcock, this is undoubtedly some of her most charismatic, star power-driven acting yet, and it’s a ton of fun to experience.
Sirensexamines the connection between two estranged sisters: one, who has been left behind to care for their ailing father, and the other, who has begun working for an enigmatic billionaire’s wife who leads a cult-like community on an island.Alcock plays Simone, the younger of the two sisterswho’s been working on the island.
Milly Alcock Stars Alongside A Notable Cast In Netflix’s Sirens
Sirens Features Legendary Actors Like Julianne Moore
Milly Alcock is anintegral part ofSirens’ensemble cast,managing to shine among talentedstars like Meghann Fahy (The White Lotus) and Glenn Howerton (It’s Always Sunny in Philadelphia), and industry legends Julianne Moore (Magnolia) and Kevin Bacon (Footloose).
In an ensemble cast, it can be incredibly hard for a young actor to stand out, especially when that cast features talent as seminal as Kevin Bacon or Julianne Moore. Regardless, Milly Alcock managed to prosper inSirens, and it’s necessary viewing material for any fans of her.