Sirens made us love her, but this Australian drama proves Milly Alcock was always a star

Since Sirens arrived on Netflix in May 2025, viewers have seen Milly Alcock in a new light. In this show, she plays Simone, a young assistant at a wealthy beach house.

Over one weekend, Simone faces choices about family and work. Alcock’s subtle expressions and restrained gestures carry much of the story. Although many of us first noticed her in big-budget projects, her earlier Australian roles reveal the depth and polish she brought to every part, proof that she was always ready for a spotlight.

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Milly Alcock's early Australian TV roles laid the groundwork

Milly Alcock began acting on Australian television in her teens. She took small parts in shows such as Wonderland and Pine Gap. These early roles may have seemed minor, but they let her tackle different genres from romantic drama to political thriller and learn how to shape a character in just a few scenes.

In 2019, she joined Upright, a road-trip drama about two mismatched travelers, and her portrayal of Meg drew notice for its emotional honesty. That performance earned her a rising-star nomination at the Casting Guild of Australia, showing that even in a large ensemble, her presence stood out. Those experiences taught her timing, emotional clarity, and how to connect with an audience, skills that underpin every scene she now plays.

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House of the Dragon brought her international attention

In 2022, Milly Alcock joined HBO’s House of the Dragon as young Rhaenyra Targaryen. This role introduced her to audiences worldwide. She had to match the style of an older actor while making the character her own.

Though the show was known for its dragons and large-scale fantasy, Alcock kept her focus on the human moments. Viewers saw her handle both fantasy elements and personal scenes with equal care.

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Sirens focuses on quiet moments and moral choices

The show is set over a tense weekend at a luxury beach house. Simone works for a wealthy client and must navigate her loyalty to her boss and her ties to her family.

When her sister arrives with concerns, Simone faces a tough decision. Milly Alcock uses soft tones, worried looks, and minor actions to show each change in Simone’s feelings. These everyday moments help the story feel familiar and real.

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Her steady presence earns genuine praise

Feedback on social media and review sites highlights Alcock’s calm style in Sirens. Viewers note how she makes Simone’s emotions feel grounded rather than exaggerated. Co-actors and critics alike comment on her timing and focus during quiet scenes.

They point out that she listens and reacts in ways that ring true. This steady approach ties together the story without needing large speeches or dramatic outbursts.

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Her career path shows consistent growth

Looking back, Sirens is one point on Milly Alcock's steady rise. She moved from small Australian roles to a major fantasy series and now to a character-driven drama.

Each role required different strengths: local realism in Upright, large-scale emotion in House of the Dragon, and subtle tension in Sirens. This path shows she can adjust to new stories while keeping a clear, honest style.

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Milly Alcock has not confirmed her next project. Industry reports suggest she may soon work on another series or film. Given her past choices, she may pick roles that let her explore fresh characters and emotions. Whether in a large ensemble or a smaller drama, her work in Sirens proves she’s ready for whatever comes next.

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