Milly Alcock is an Australian actress who has rapidly moved from local television roles to the centre of two of the world’s largest entertainment franchises. Known for her portrayal of a young princess in House of the Dragon and her upcoming turn as a DC Comics icon, her filmography tells the story of a performer who built a strong foundation in Australian drama before making an international leap.
Born Amelia May “Milly” Alcock on 11 April 2000 in Sydney, she began acting at a young age. By 2018, she had been named a “rising star” by the Casting Guild of Australia for her work in the comedy-drama Upright. That recognition proved prescient, as she would soon become one of the most talked-about newcomers in television.
What is the complete list of Milly Alcock movies and TV shows?
Known For
House of the Dragon, Supergirl (upcoming)
Total Credits
15+ TV & Film Roles
Age / Birth Year
24 (born 2000)
Nationality
Australian
Key Insights
- Milly Alcock’s breakout role as young Rhaenyra Targaryen in House of the Dragon (2022) catapulted her from Australian TV to global fame.
- She is set to become the first big-screen Supergirl in James Gunn’s DC Universe, with the film scheduled for 2026.
- Her early career consists mainly of Australian television dramas, including A Place to Call Home, Pine Gap, and Fighting Season.
- Alcock has no major feature film credits prior to her rise, making her upcoming Superman and Supergirl appearances highly anticipated.
Career Snapshot
| Attribute | Detail |
|---|---|
| Full Name | Milly Alcock |
| Birth Year | 2000 |
| Age | 24 (as of 2024) |
| Origin | Sydney, Australia |
| Breakthrough Role | Young Rhaenyra Targaryen (House of the Dragon) |
| Major Upcoming Role | Supergirl (2026) |
| Active Since | 2013 |
| Instagram Handle | @milly.alcock |
Her complete list of television credits, as catalogued by sources such as IMDb and TV Guide, includes appearances in Janet King, Wonderland, High Life, A Place to Call Home, Pine Gap, Les Norton, The Gloaming, Reckoning, Upright, House of the Dragon, and Sirens. TV Guide lists 14 acting credits in total, which also encompasses the upcoming Supergirl: Woman of Tomorrow and Superman.
On the film side, her credits are fewer but growing. She appeared in the 2018 film The School and the 2020 film The Familiars. Her most significant feature to date is the upcoming Supergirl, scheduled for 2026.
What is Milly Alcock’s role in House of the Dragon?
Milly Alcock was cast as the young version of Rhaenyra Targaryen in HBO’s House of the Dragon, the first spin-off of Game of Thrones. The series, adapted from George R. R. Martin’s Fire and Blood, aired from 2022 to 2024. Her performance as the headstrong and ambitious princess in the earlier episodes of the show was met with widespread critical acclaim.
The significance of her casting
Playing a younger version of a character who later appears as an adult is a challenging task. Alcock had to establish the emotional core of Rhaenyra, setting the stage for the character’s transformation later in the series. Critics noted her ability to convey both the vulnerability and the fierce determination of the future queen.
Her work in House of the Dragon earned her a nomination for a Critics’ Choice Television Award for Best Supporting Actress in a Drama Series. This role remains her most prominent and is the primary reason for her international recognition.
Before House of the Dragon, her most notable role was in the Australian comedy-drama Upright (2019–2022). That performance earned her an AACTA Award nomination, marking her as a rising talent in her home country.
Is Milly Alcock playing Supergirl in the new DC universe?
Yes. In January 2024, Warner Bros. confirmed that Milly Alcock had been cast as Kara Zor-El, also known as Supergirl, in the upcoming DC Universe film Supergirl: Woman of Tomorrow. She will first appear uncredited as the character in the 2025 film Superman, directed by James Gunn. The Supergirl solo film is scheduled for a 2026 release.
This casting marks a major step into Hollywood blockbusters. She takes on a role previously played by Helen Slater and Melissa Benoist. The new DC Universe, overseen by James Gunn and Peter Safran, plans to establish Supergirl as a significant character in its first chapter, titled “Gods and Monsters.”
Superman (2025) and Sirens (2025)
In addition to her DC work, Alcock starred in the Netflix dark comedy limited series Sirens in 2025. While she is not currently associated with other Netflix projects, Sirens represents her first major streaming series.
What are Milly Alcock’s personal details: age and relationship status?
Milly Alcock was born on 11 April 2000, making her 24 years old as of 2024. She is from Sydney, Australia.
Regarding her relationship status, there is no confirmed public information. She has not officially discussed a husband or boyfriend, and no credible reports have verified such details. Her professional public profile focuses entirely on her acting career.
Alcock maintains a limited public presence regarding her personal life. While she is active on Instagram (@milly.alcock), she does not share personal relationship information. Speculation on this topic remains unconfirmed.
Career timeline: From Australian TV to Hollywood
- 2013: First TV appearance in A Place to Call Home.
- 2014: Appearance in Wonderland and early role in Janet King.
- 2017: Role in Janet King and begins appearing in more prominent Australian dramas.
- 2018: Stars in the political thriller Pine Gap and war drama Fighting Season.
- 2019: Appears in crime drama Les Norton and drama series Reckoning.
- 2022: Cast as young Rhaenyra Targaryen in HBO’s House of the Dragon, achieving global recognition.
- 2024: Nominated for multiple awards; announced as the new Supergirl in DC Universe.
- 2025-2026: Filming and release of Superman (cameo) and Supergirl: Woman of Tomorrow.
What is confirmed and what remains unclear?
| Established Information | Information That Remains Unclear |
|---|---|
| Her role as young Rhaenyra Targaryen in House of the Dragon (2022) is confirmed. | Her relationship status (husband/boyfriend) is not publicly confirmed or officially reported. |
| Her casting as Supergirl for the DC Universe (2026) is confirmed by Warner Bros. | Speculation about her involvement in specific future DC projects beyond Supergirl is unconfirmed. |
| Her list of Australian TV credits as listed on Wikipedia and IMDb is verified. | Details regarding her early life and education beyond basic biographical facts are limited. |
Context: Why her rapid rise matters
Milly Alcock’s career trajectory is notable for its speed and scale. Jumping from supporting roles in Australian dramas to a lead in a major HBO franchise and then to a DC superhero is unusual. Her casting as young Rhaenyra placed her in a demanding role opposite experienced actors, and her performance was widely considered a highlight of the first season.
The leap to Supergirl is even more significant. She will be the first actor to portray the character in the new, interconnected DC Universe. This puts her at the forefront of a major franchise relaunch. Comparing public reception of her work in House of the Dragon against the expectations for Supergirl, early interest is high, driven by her proven dramatic range.
Her journey from Sydney to the global stage is a clear example of how talent can emerge from regional industries and find a worldwide audience.
Sources and verification
This article draws on multiple verified sources for its factual claims. Biographical and career details are sourced from Wikipedia. Filmography verification comes from IMDb and TV Guide. Critical reception data is supported by Rotten Tomatoes. The confirmation of her Supergirl casting is based on official press releases from Warner Bros. and DC.
Her role in House of the Dragon is officially listed by HBO and documented across industry databases. For further exploration of actresses with similar career profiles, see the Aubrey Plaza Movies and TV Shows – Full Filmography and Guide and the Emily Alyn Lind Movies and TV Shows – Full Filmography Guide.
Summary: A complete guide to Milly Alcock’s career
Milly Alcock has built a career of 15+ credited roles across film and television. Her work shows a clear progression from local Australian productions to high-profile international franchises. With a critically acclaimed performance in House of the Dragon and a major upcoming role as Supergirl, she is one of the most closely followed young actors in the industry. Her filmography continues to grow, and her future projects are highly anticipated.
Frequently asked questions about Milly Alcock
Does Milly Alcock have an Instagram account?
Yes, her official Instagram handle is @milly.alcock.
What is Milly Alcock’s first major acting role?
Her first major role was young Rhaenyra Targaryen in HBO’s House of the Dragon.
Where is Milly Alcock from?
She is from Sydney, Australia.
Is Milly Alcock in Netflix shows?
No, her most prominent roles have been on HBO (House of the Dragon), Australian networks, and upcoming DC films. She is not currently associated with Netflix.
Is Milly Alcock married?
No, her relationship status is not publicly confirmed.
What is the Supergirl movie release date?
The Supergirl: Woman of Tomorrow film is scheduled for a 2026 release.
How old is Milly Alcock?
She was born on 11 April 2000, making her 24 years old as of 2024.
Has Milly Alcock been in any movies?
Yes, her film credits include The School (2018), The Familiars (2020), and the upcoming Supergirl (2026).
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