Milly Alcock (born April 11, 2000) is an Australian actress who broke through internationally as young Princess Rhaenyra Targaryen in HBO’s House of the Dragon. Her performance helped define the show’s early episodes and quickly made her one of the most talked-about new faces to emerge from the Game of Thrones universe.
Before that global spotlight, Alcock had already built strong momentum in Australia, especially with her work as Meg in the comedy-drama Upright. Since then, her career has kept expanding across TV, film, and stage, including a West End run as Abigail Williams in The Crucible and major franchise momentum with her casting as Kara Zor-El, also known as Supergirl, in DC’s upcoming feature film slate.
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Quick Facts
| Real Name: | Amelia May Alcock |
| Profession: | Actress |
| Born: | April 11, 2000 |
| Age: | 25 (as of 2026) |
| Birthplace: | Sydney, New South Wales, Australia |
| Nationality: | Australian |
| Known For: | Young Rhaenyra Targaryen on House of the Dragon, Meg on Upright |
| Notable Film & TV: | Upright; House of the Dragon; Sirens; Superman (cameo); Supergirl (upcoming) |
| Awards: | Casting Guild of Australia Rising Star (won), plus major award nominations (AACTA, Critics Choice, Logies, Saturn) |
| Zodiac Sign: | Aries |
| Relationship: | Keeps personal life private |
| Years Active: | 2013 to present |
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Early Life & Education
Milly Alcock was born in Sydney, Australia, and grew up in the inner-west suburb of Petersham. She has described being pulled toward performance early, including childhood school productions that helped spark her interest in acting.
She attended Stanmore Public School and later Newtown High School of the Performing Arts. As her career accelerated, she left school in 2018 after being cast in Upright, a turning point that quickly moved her from local work into a much bigger professional lane.
Career Highlights and Milestones
Alcock’s early screen work built steadily across Australian TV, with roles in series like Janet King, A Place to Call Home, Pine Gap, and Les Norton. That run gave her a broad base before her first major breakout as Meg in Upright, where she played a sharp, complicated runaway on a long journey across Australia. The role brought industry recognition and helped position her as one of the strongest young performers of her cohort.
Her global visibility surged when she was cast as young Rhaenyra Targaryen in House of the Dragon, a role that put her in the center of one of TV’s biggest fantasy franchises. Since then, she has continued to expand in multiple directions, including a West End stage debut as Abigail Williams in The Crucible, a lead role in Netflix’s limited series Sirens, and a major franchise step forward as Kara Zor-El, also known as Supergirl, in DC’s upcoming film lineup.
Selected film and TV highlights
- Upright (2019 to 2022)
- House of the Dragon (2022 to 2024)
- Reckoning (2020)
- The Gloaming (2020)
- The School (2018)
- Sirens (2025)
- Superman (2025, cameo)
- Supergirl (2026, upcoming)
Major recognition
- Casting Guild of Australia, Rising Stars of 2018 (won)
- AACTA Awards nomination for Upright (Best Comedy Performer)
- Critics Choice Television Awards nomination (Best Supporting Actress in a Drama Series) for House of the Dragon
- Critics Choice Super Awards nomination (Best Actress in a Science Fiction/Fantasy Series)
- Logie Awards nomination (Most Outstanding Actress) for Upright
- Saturn Awards nomination (Best Performance by a Younger Actor on a TV Series) for House of the Dragon
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Awards and Accolades
| Year | Award | Category | Work | Result |
|---|---|---|---|---|
| 2018 | Casting Guild of Australia | Rising Stars of 2018 | Television career | Won |
| 2020 | AACTA Awards | Best Comedy Performer | Upright | Nominated |
| 2022 | IGN Summer Movie Awards | Best Performance in a TV Series | House of the Dragon | Nominated |
| 2023 | Critics Choice Television Awards | Best Supporting Actress in a Drama Series | House of the Dragon | Nominated |
| 2023 | Critics Choice Super Awards | Best Actress in a Science Fiction/Fantasy Series | House of the Dragon | Nominated |
| 2023 | Logie Awards | Most Outstanding Actress | Upright | Nominated |
| 2024 | Saturn Awards | Best Performance by a Younger Actor on a TV Series | House of the Dragon | Nominated |
Filmography / Notable Works
| Year | Title | Type | Role / Notes |
|---|---|---|---|
| 2014 | Wonderland | TV | Early TV appearance (teenage debut). |
| 2017 | Janet King | TV | First named role (Cindi Jackson), 3 episodes. |
| 2018 | The School | Film | Feature film role (Jien). |
| 2019 to 2022 | Upright | TV | Breakout role as Meg Adams (main cast). |
| 2020 | The Gloaming | TV | Supporting role (Jenny McGinty). |
| 2020 | Reckoning | TV | Supporting role (Sam Serrato). |
| 2022 to 2024 | House of the Dragon | TV | Young Princess Rhaenyra Targaryen (main role season 1; guest season 2). |
| 2023 | The Crucible | Theatre | West End debut as Abigail Williams (Gielgud Theatre). |
| 2025 | Sirens | TV (limited) | Main role as Simone DeWitt. |
| 2025 | Superman | Film | Cameo appearance as Kara Zor-El / Supergirl (reported cameo). |
| 2026 | Supergirl | Film | Lead role as Kara Zor-El / Supergirl (scheduled). |
Net Worth, Income, & Lifestyle
| Category | Details |
|---|---|
| Net Worth (2026) | Public estimates vary widely. Milly Alcock has not disclosed a verified net worth figure, and reliable public documentation is limited. |
| Income Sources | Acting across TV and film, including major franchise work (House of the Dragon and DC’s Supergirl), plus stage work and related publicity campaigns. |
| Properties & Assets | Personal financial details are kept private. Most coverage centers on her roles and career trajectory rather than disclosed assets. |
| Lifestyle | Often described as career-focused and craft-driven, balancing Australian roots with international work as her projects have shifted to London and global productions. |
Social Media & Online Presence
| Platform | Details |
|---|---|
| Official account commonly listed as @millyalcock (verification and follower counts can change over time). | |
| X (Twitter) | No consistently verifiable official handle is confirmed here. Treat lookalike accounts cautiously. |
| TikTok | No clearly verified personal TikTok is confirmed here. Most content is clips, interviews, and reposts. |
| IMDb | Verified filmography at IMDb. |
| Official Pages | Major project pages and studio coverage are the most reliable references (HBO for House of the Dragon, Netflix for Sirens, DC/Warner Bros. for Supergirl). |
Fan communities on social media (unofficial)
NOTE: In addition to any official accounts listed above, many fan-run pages and clip accounts exist. These are not confirmed to be affiliated with Milly Alcock. Links and usernames can change at any time.
Trivia & Lesser-Known Facts
- She was raised in Sydney’s inner west and was introduced to acting through school productions before going professional.
- She left high school in 2018 after being cast in Upright, a role that quickly changed the scale of her opportunities.
- She made her West End stage debut as Abigail Williams in The Crucible in 2023.
- Before House of the Dragon accelerated her global visibility, she worked side jobs in Sydney while auditioning and building credits.
- Her post-breakout run has included both prestige-leaning work (Upright, stage roles) and large franchise momentum (DC’s Supergirl).
Quotes
“When your life changes that drastically it’s hard to go back to the place that you’re from.”
— Milly Alcock, quoted in The Standard Theatre Podcast feature (2023)
“I can’t do this. This is terrible. This is a big mistake.”
— Milly Alcock, recalling her early nerves on House of the Dragon (Entertainment Weekly, 2025)
“Simone is so different from myself and anybody that I’ve played, so her as a character was really intriguing to me.”
— Milly Alcock on Sirens (Town & Country, 2025)
“It made me want a sister.”
— Milly Alcock on filming Sirens (Teen Vogue, 2025)
Frequently Asked Questions (FAQs)
Q: What is Milly Alcock’s age?
A: She is 25 years old (born April 11, 2000).
Q: What is Milly Alcock’s real name?
A: Her birth name is Amelia May Alcock.
Q: What is Milly Alcock best known for?
A: She is best known for playing young Rhaenyra Targaryen in HBO’s House of the Dragon and for her breakout Australian role as Meg in Upright.
Q: Where is Milly Alcock from?
A: She was born in Sydney, New South Wales, Australia, and was raised in the Sydney suburb of Petersham.
Q: Did Milly Alcock finish high school?
A: She left school in 2018 after being cast in Upright, as her acting career accelerated.
Q: What upcoming franchise role is Milly Alcock stepping into?
A: She has been cast as Kara Zor-El, also known as Supergirl, in DC’s upcoming Supergirl film, scheduled for release in 2026.
Upcoming Projects
- Supergirl (2026) – Alcock is set to headline the DC film as Kara Zor-El / Supergirl, with a U.S. release date listed as June 26, 2026.
- Thumb (TBA) – Listed as an upcoming film project in development/production reporting (status and release timing can shift).
- Superman (2025) – A cameo appearance as Supergirl has been widely reported in film listings tied to the new DCU rollout.
Interviews & Features
- NYLON, “Milly Alcock On Stepping Into ‘House Of The Dragon’” (Sep 14, 2022) , a candid early-breakout interview about stepping into a massive franchise audience, handling pressure, and what she wanted to do next.
- The Standard, “The Evening Standard Theatre Podcast: Milly Alcock & Caitlin FitzGerald on The Crucible” (Jun 26, 2023) , a theatre-focused conversation about her West End debut, the challenge of classic language, and how life changed after House of the Dragon.
- WhatsOnStage, “Milly Alcock, Fisayo Akinade and more discuss The Crucible in the West End” (Jun 20, 2023) , an opening-period feature introducing the production and highlighting Alcock’s West End role as Abigail Williams.
- Entertainment Weekly, “Milly Alcock says House of the Dragon higher-up informed her she’d be getting an acting coach” (May 20, 2025) , a profile-style news interview built around her first major U.S. talk show appearance and her candid reflection on early-set nerves.
- Teen Vogue, “Netflix’s Sirens Stars Meghann Fahy, Milly Alcock Talk Sisterhood, Trauma and That Scene” (May 22, 2025) , a longer-form cast interview centered on the show’s themes, the sisters dynamic, and how Alcock approached Simone.
- Town & Country, “Milly Alcock Explains the Sirens Finale” (May 23, 2025) , a spoiler-aware interview focused on character motivation and why wealth-driven stories continue to attract audiences.
- Netflix Tudum, “Hey, Hey, Dark Comedy Sirens Has Come Calling” (Nov 26, 2025) , Netflix’s overview of the limited series with key cast, tone notes, and official framing of the show.
Public Appearances & Festivals
- House of the Dragon World Premiere (July 27, 2022): Alcock attended the premiere in Los Angeles at the Academy Museum of Motion Pictures during the show’s launch week.
- House of the Dragon UK Premiere (Aug 15, 2022): She appeared in London at Leicester Square for the Sky Group premiere.
- 80th Golden Globe Awards (2023): Alcock appeared during the Golden Globes period as House of the Dragon earned major mainstream attention and a Best Drama Series win.
- The Crucible West End opening period (June 2023): She took part in London press and opening-week features tied to her West End debut as Abigail Williams.
- Sirens New York premiere week (May 2025): Alcock appeared at the show’s New York premiere circuit tied to Netflix’s launch of the limited series.
- BAFTA Awards red carpet (2026): She attended the BAFTAs in London during the awards-season stretch tied to her rising global profile.
