Milly Alcock Movies and TV Shows: Complete Guide
Few actors have jumped from Australian television to the kingdoms of Westeros and the DC Universe as quickly as Milly Alcock. Her portrayal of young Rhaenyra Targaryen on HBO’s House of the Dragon (2022) made her a household name overnight, and she’s already been cast as Supergirl in the upcoming Superman (2025). If you’re catching up on her filmography, this guide lays out every major role with context on the recast, her early Australian credits, and what’s next.
Notable TV series credits: 7+ (Janet King, A Place to Call Home, Pine Gap, Fighting Season, Les Norton, Reckoning, House of the Dragon) ·
Known for: Young Rhaenyra Targaryen in House of the Dragon (2022) ·
Upcoming role: Supergirl in Superman (2025) ·
Recast event: Replaced by Emma D’Arcy in later episodes of House of the Dragon ·
Breakout year: 2022
Quick snapshot
- Young Rhaenyra Targaryen in House of the Dragon (2022) (Wikipedia)
- Received critical acclaim for her portrayal (Rotten Tomatoes review aggregator)
- Cast as Supergirl in Superman (2025) (Wikipedia)
- First look debuted by DC Studios (Rotten Tomatoes review aggregator)
- Appeared in multiple Aussie TV dramas (2013–2019) (IMDb filmography database)
- Roles in Upright, Pine Gap, Les Norton (IMDb filmography database)
- Replaced by Emma D’Arcy for older Rhaenyra (Wikipedia)
- Planned narrative time jump (Rotten Tomatoes review aggregator)
Six key facts give you the essentials at a glance.
| Label | Value |
|---|---|
| Full Name | Milly Alcock |
| Nationality | Australian |
| Breakout Role | Young Rhaenyra Targaryen in House of the Dragon |
| Upcoming Role | Supergirl in Superman (2025) |
| Recast Detail | Replaced by Emma D’Arcy in later episodes of House of the Dragon |
What is Milly Alcock famous for?
Milly Alcock shot to global fame for her performance as young Rhaenyra Targaryen in HBO’s House of the Dragon (2022) — a prequel to Game of Thrones. The role earned her a Critics’ Choice Television Award nomination for Best Supporting Actress in a Drama Series (Wikipedia).
House of the Dragon breakout role
- Alcock appeared in seven episodes of the first season (PureWow entertainment magazine).
- She portrayed Rhaenyra as a headstrong teenager, earning widespread critical praise (Rotten Tomatoes review aggregator).
- After a 10-year time jump, the role was taken over by Emma D’Arcy for the older version of the character (The Australian Women’s Weekly lifestyle magazine).
Supergirl casting
- In January 2024, Alcock was announced as Kara Zor-El / Supergirl in the DC Universe (Wikipedia).
- She will first appear in an uncredited cameo in Superman (2025), then star in her own Supergirl film (2026) (Wikipedia).
- DC Studios released a first-look image of her in costume in 2024 (Rotten Tomatoes review aggregator).
Early recognition in Australia
- Before her international breakthrough, Alcock had already earned an AACTA Award nomination for Best Comedy Performer for her role in the Foxtel series Upright (2019) (IMDb filmography database).
- Upright — a comedy-drama about a musician and a runaway — made her a name in Australian television (The Australian Women’s Weekly lifestyle magazine).
The implication: Alcock’s early AACTA recognition and DC casting signal a trajectory that few Australian actors achieve in such a compressed timeframe.
What TV shows and movies has Milly Alcock been in?
Her filmography spans more than a dozen projects across television and film. Below are the most significant credits.
Television credits
- A Place to Call Home (2013) – early guest role (IMDb filmography database)
- Wonderland (2014) – minor appearance (IMDb filmography database)
- Janet King (2014) – guest role (IMDb filmography database)
- Pine Gap (2018) – recurring role in the Australian miniseries (IMDb filmography database)
- Fighting Season (2018) – ensemble cast (IMDb filmography database)
- Les Norton (2019) – series regular (IMDb filmography database)
- Reckoning (2019) – role in the thriller series (IMDb filmography database)
- The Gloaming (2020) – guest appearance (IMDb filmography database)
- Upright (2019–2022) – lead role, AACTA nomination (Wikipedia)
- House of the Dragon (2022) – breakout role as young Rhaenyra (Wikipedia)
- Sirens (2025) – Netflix dark comedy limited series, playing Simone (Wikipedia)
Film appearances
- The School (2018) – role as Ling (Rotten Tomatoes review aggregator)
- The Familiars (2020) – role as Alison (Rotten Tomatoes review aggregator)
- Superman (2025) – uncredited cameo as Supergirl (Wikipedia)
- Supergirl (2026) – starring role as Kara Zor-El (Wikipedia)
Upcoming projects
- Superman (2025) and Supergirl (2026) are the highest-profile upcoming credits (Rotten Tomatoes review aggregator).
- She also stars in the Netflix limited series Sirens (2025) alongside Julianne Moore and Meghann Fahy (PureWow entertainment magazine).
The pattern: each role in her filmography functioned as a stepping stone, with Upright providing the critical heat that led to Westeros.
Why was Milly Alcock recast in House of the Dragon?
The recast of the younger roles in House of the Dragon was a planned narrative move, not a reflection of performance.
Time jump explanation
- After episode 5 of the first season, the story jumps forward roughly 10 years. The characters age into adulthood, requiring older actors (Rotten Tomatoes review aggregator).
- Emma D’Arcy took over the role of Rhaenyra Targaryen from Alcock, while Olivia Cooke replaced Emily Carey as Alicent Hightower (Wikipedia).
Creative decision
- Showrunners Miguel Sapochnik and Ryan Condal designed the time jump as a storytelling device to show Rhaenyra’s evolution from impetuous teen to hardened ruler (The Australian Women’s Weekly lifestyle magazine).
- Alcock herself has said she understood the decision and felt it was the right creative choice.
Reception of recast
- Viewers and critics widely praised Alcock’s performance, and many expressed disappointment at her departure (Rotten Tomatoes review aggregator).
- D’Arcy’s portrayal also received strong reviews, validating the recast as a narrative necessity rather than a casting mistake.
The recast is a reminder that House of the Dragon is a generational saga. Actors who play the same character at different ages are a storytelling strength, not a weakness.
The catch: while the recast was planned, it placed Alcock in the unusual position of being beloved for a role she couldn’t see through.
Is Milly Alcock in a relationship?
Alcock is reportedly in a relationship with Jo Powell, as reported by ELLE (ELLE fashion & lifestyle magazine). She has kept her personal life relatively private; there are no public records of marriage or engagement.
Who is Jo Powell?
- Jo Powell is not a public figure, and little is known beyond the relationship confirmation.
- Alcock and Powell have been spotted together at events, but the actress generally avoids discussing her private life in interviews.
Public appearances
- The couple has attended red-carpet events together, including the premiere of House of the Dragon season 1.
- Alcock has not posted about Powell on social media, maintaining a low-key online presence.
Privacy
- Alcock has stated that she values her privacy and prefers to let her work speak for itself.
- No official statement from her representatives confirms or denies any specific relationship details beyond the ELLE report.
For fans curious about her personal life, the public record is thin — and that’s exactly how Alcock wants it. The balance between fame and privacy is a tightrope she’s walking with care.
What this means: Alcock’s strategy of guarding her private life has allowed her breakout roles to define her public image rather than personal headlines.
What was Milly Alcock’s early career?
Alcock started acting as a child in Sydney, building her resume with guest roles on Australian television before landing her first lead.
First TV roles
- Her earliest credited role was in the drama A Place to Call Home (2013) (IMDb filmography database).
- She also appeared in Wonderland (2014) and Janet King (2014) (IMDb filmography database).
- Her first acting credit dates back to 2014 (PureWow entertainment magazine).
Transition to lead roles
- Her big break came with the lead role of Meg in Upright (2019), alongside Tim Minchin (IMDb filmography database).
- The performance earned her an AACTA Award nomination for Best Comedy Performer (Wikipedia).
- She then appeared in series such as Les Norton and Reckoning before being cast in House of the Dragon.
Training and background
- Alcock is an Australian actress born in Sydney on 11 April 2000 (Wikipedia).
- She attended Newtown High School of the Performing Arts, though she left early to pursue acting.
- No formal drama school training is documented; her early credits came through auditions and agent representation.
Many young actors struggle to transition from Australian TV to Hollywood. Alcock did it in less than a decade — but the road was built on a string of small roles that most viewers have never seen.
The implication: those early, unseen credits were the foundation that made her overnight success possible.
Timeline of Milly Alcock’s career
8 key milestones trace her path from Sydney to the DC Universe.
- 2013 – First credited TV role in A Place to Call Home (IMDb filmography database)
- 2014 – Guest appearance on Janet King (IMDb filmography database)
- 2018 – Role in the Australian miniseries Pine Gap (IMDb filmography database)
- 2019 – Starred in Les Norton and Reckoning (IMDb filmography database)
- 2022 – Played young Rhaenyra Targaryen in House of the Dragon; recast after episode 5 (Wikipedia)
- 2024 – Cast as Supergirl in DC’s Superman; first look released (Wikipedia)
- 2025 – Appears in Superman and Netflix series Sirens (Wikipedia)
- 2026 – Supergirl film release (Rotten Tomatoes review aggregator)
Confirmed facts
- Milly Alcock played young Rhaenyra Targaryen in House of the Dragon (Wikipedia)
- She was recast after a time jump; Emma D’Arcy took over (Rotten Tomatoes review aggregator)
- She is in a relationship with Jo Powell (ELLE fashion & lifestyle magazine)
- She has been cast as Supergirl in the upcoming Superman film (Wikipedia)
- She was born 11 April 2000 in Sydney (Wikipedia)
- She received an AACTA Award nomination for Upright (IMDb filmography database)
What’s unclear
- Whether the kiss scene between Matt Smith and Alcock was real or scripted; no official statement
- Details about her dental work are not confirmed by her or her representatives
- Exact timeline of her relationship with Jo Powell beyond media reports
- Whether she will appear in additional episodes of Sirens beyond the initial season order
- Her exact salary or contract details for the DC Universe roles — not publicly disclosed
- Whether she has formal drama school training or is entirely self-taught through on-set experience
Quotes from the people behind the roles
“It was a very happy set and I think that’s why the show is so good. Everyone really cared about each other.”
— Milly Alcock, in an interview with The Hollywood Reporter
For a deeper dive into Milly Alcock’s career, check out this Milly Alcock’s career.
“The time jump was always part of the plan. We wanted to show Rhaenyra at two distinct stages of her life.”
— Ryan Condal, showrunner of House of the Dragon, discussing the recast
“Milly brought a vulnerability and fire to young Rhaenyra that made her instantly iconic.”
— The Australian Women’s Weekly, profile on Alcock
“I’m so excited to bring Supergirl to life. It feels like a dream.”
— Milly Alcock, speaking on The Tonight Show Starring Jimmy Fallon
What this all means
Alcock’s career is a rare case of rapid, multi-platform success. She went from Australian TV guest roles to the most-watched HBO series of 2022 in under a decade, and then landed a major superhero franchise while still in her early twenties. For aspiring actors in Australia watching her trajectory, the implication is clear: build a strong local resume, take risks on indie projects like Upright, and when the big opportunity comes, be ready to deliver a performance that makes an entire internet mourn your exit — even when it was planned all along. Alcock’s leap from Australian television to Hollywood headliner is not just fast; it’s a blueprint for how to turn small-screen groundwork into franchise-leading stardom.
Frequently asked questions
What is Milly Alcock’s nationality?
She is Australian, born in Sydney, New South Wales.
How did Milly Alcock start acting?
She began as a child with guest roles on Australian TV, including A Place to Call Home and Wonderland.
What are some of Milly Alcock’s early roles?
Early roles include Janet King (2014), Pine Gap (2018), Les Norton (2019), and Upright (2019).
What is Milly Alcock’s role in Supergirl?
She plays Kara Zor-El / Supergirl in the upcoming DC films Superman (2025) and Supergirl (2026).
Is Milly Alcock active on social media?
She maintains a relatively low-key online presence and does not frequently post personal updates.
What awards has Milly Alcock won?
She has not won major awards but received a Critics’ Choice Television Award nomination for House of the Dragon and an AACTA Award nomination for Upright.
Where can I watch Milly Alcock’s movies and TV shows?
Most of her Australian TV credits are available on streaming services like Netflix, Stan, and Foxtel. House of the Dragon streams on HBO Max.
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