Milly Alcock’s journey from Australian television to the global stage has been remarkably swift. Best known for her portrayal of a young princess in a fantasy epic and now set to embody one of DC’s most iconic heroes, the 25-year-old has quickly become one of the most closely watched actors of her generation. This profile examines her age, height, filmography, personal life, and what lies ahead in 2026.
Born Amelia May Alcock in Sydney, Australia, she first captured attention in her home country with a breakout comedic role before landing a part that would change her career. Her casting as the new Supergirl marks a significant milestone, placing her at the center of a major studio franchise.
What follows is a comprehensive look at the facts surrounding her life and work, grounded in verified sources and official announcements.
How Old Is Milly Alcock? Age, Height, and Ethnicity
Milly Alcock was born on April 11, 2000, in Sydney, New South Wales, Australia. She is 25 years old in 2025 and will turn 26 in April 2026. Her height is consistently reported as 5 feet 5 inches (165 cm).
While she is of Australian nationality, her specific ethnic background has not been publicly detailed by the actress. Most sources describe her as of Caucasian or European descent. She has not made an official statement regarding her ethnicity.
Amelia May Alcock
11 April 2000 (age 25 in 2025)
Australian
Actress
House of the Dragon (Rhaenyra Targaryen), Upright
Supergirl (2026), Sirens (2025)
Key Insights at a Glance
- Milly Alcock rose to fame at age 22 playing young Rhaenyra Targaryen in HBO’s House of the Dragon.
- She is set to star as Supergirl in the upcoming DC Universe film, releasing June 26, 2026.
- Despite her rapid rise, she maintains a low personal profile – no confirmed relationships or public social media posts about dating.
- Her career began in Australian television with roles in Upright and other series before landing the blockbuster fantasy role.
- She received an AACTA Award nomination for her performance in Upright.
| Field | Value |
|---|---|
| Age | 24 (as of 2024); turns 25 on 11 April 2025 |
| Height | 5 ft 5 in (165 cm) |
| Ethnicity | White / Caucasian (Australian) |
| Birthplace | Sydney, Australia |
| Years active | 2014–present |
| Notable award | AACTA Award nomination for Best Actress in a Comedy (Upright) |
What Movies and TV Shows Has Milly Alcock Starred In?
Alcock’s filmography spans more than a decade, beginning with early television appearances in Australian productions. Her first credited roles came in series such as A Place to Call Home (2013), Wonderland (2014), and Janet King (2014). From 2015 to 2017, she also hosted content on Australia’s Disney Channel.
The Breakthrough: Upright
The turning point in her early career was the Foxtel comedy-drama Upright, which premiered in 2019. Alcock played Meg, a runaway teenager, alongside Tim Minchin. The performance earned her an AACTA Award nomination for Best Actress in a Comedy and a Casting Guild of Australia Rising Star Award. Further details on her early recognition can be found through the AACTA Awards official records.
Notably, she dropped out of high school at age 18 to take the leading role in Upright after being offered the part.
Global Recognition: House of the Dragon
Her casting as the young Rhaenyra Targaryen in HBO’s House of the Dragon (2022) brought her international fame. The role earned her a Critics’ Choice Television Award nomination for Best Supporting Actress. She played the character in the first season, after which the role was recast with Emma D’Arcy for later seasons. More about the series is available on the official HBO House of the Dragon page.
Other Notable Roles
Her television credits also include Pine Gap (2018), Fighting Season (2018), Les Norton (2019), Reckoning (2019), and The Gloaming (2020). In 2025, she appeared in the Netflix limited series Sirens alongside Julianne Moore and Meghann Fahy, as listed on Netflix.
Milly Alcock’s performance in Upright not only launched her career but also demonstrated her range as a dramatic and comedic actress, paving the way for her casting in major franchise productions.
Is Milly Alcock Married?
There is no public record of Milly Alcock being married. She does not have a husband. Regarding her relationship status, she has been reported to be in a relationship with London-based chef Jo Powell since at least 2023, as confirmed by sources close to the actress. However, Alcock does not publicly discuss her personal life, and no official confirmation has been made by her representatives.
Milly Alcock maintains a notably private personal life. There is no official statement from the actress confirming or denying any relationship, and she rarely posts about her private affairs on social media.
What Is Milly Alcock Doing in 2026? Upcoming Projects
The most significant project on her horizon is the DC Universe film Supergirl, in which she stars as Kara Zor-El. The film is scheduled for release on June 26, 2026. This marks her first major movie lead role and a substantial step into blockbuster filmmaking. Updates about the film are available from DC Universe.
Before that, she made an uncredited appearance as Supergirl in the 2025 film Superman, serving as a precursor to her full role. She is the fifth actress to portray Supergirl in live-action and the third to do so in film.
As for a potential return to House of the Dragon, no official announcements have been made. The younger version of Rhaenyra Targaryen was recast after the first season, and a return is considered unlikely.
While Supergirl is confirmed for 2026, other projects beyond that have not been announced. It remains to be seen whether she will take on additional high-profile film roles or return to television.
Career Timeline: From Sydney to Supergirl
- 2014 – Early short film roles (e.g., ‘The Reunion’) – see her IMDb filmography for details.
- 2019 – Cast in Foxtel comedy-drama series Upright (seasons 1-2)
- 2021 – AACTA Award nomination for Best Actress in a Comedy (Upright)
- 2022 – Cast as young Rhaenyra Targaryen in HBO’s House of the Dragon (season 1)
- 2025 – Starred in Netflix series Sirens (released May 22)
- 2026 – Supergirl film release (June 26) – her first major movie lead role
What Is Confirmed and What Remains Unclear?
| Established Information | Information That Remains Unclear |
|---|---|
| Born 11 April 2000 in Sydney, Australia. | Marital status: No public record of a husband or marriage; she is not known to be married. |
| Professional name is Milly Alcock; full name Amelia May Alcock. | Relationship status: Not publicly disclosed; no confirmed boyfriend or partner. |
| Played young Rhaenyra Targaryen in House of the Dragon season 1. | Ethnicity: Not explicitly stated; she is of Australian background (likely Caucasian/White) but no official statement. |
| Cast as Supergirl in James Gunn’s DC Universe, film scheduled for June 26, 2026. | Net worth: Not publicly available; no reliable estimates. |
| Height is 5 ft 5 in (165 cm) per multiple credible sources. |
What Does Milly Alcock’s Career Trajectory Mean?
Milly Alcock’s casting as the young Rhaenyra Targaryen in House of the Dragon catapulted her from Australian television to global recognition. Her performance earned critical praise and set the stage for her casting as Supergirl – a milestone for any young actor. The shift from prestige HBO fantasy to the mainstream DC Universe marks a strategic career move that could define her as a leading Hollywood star. Her filmography shows a mix of comedy (Upright), drama (House of the Dragon), and now superhero fare, demonstrating versatility.
Sources and Key Quotes
“Amelia May Alcock (born 11 April 2000) is an Australian actress.”
“SuperGirl lands in theatres on… 26th of June 2026!”
Additional primary sources include her filmography listing on IMDb and the AACTA Awards nomination records.
Summary: A Rising Star With a Clear Path Forward
Milly Alcock has established herself as one of the most promising young actors of her generation. With a proven track record in both television and film, her upcoming role as Supergirl in 2026 positions her for sustained success. For more on actors who have made similar transitions, see our profile on Shira Haas – Height, Roles, and Personal Life Explained and Jensen Ackles – Full Biography, Family and Career in 2025.
Frequently Asked Questions
What is Milly Alcock’s ethnicity?
Milly Alcock is Australian. She has not publicly specified her ethnic background, but she is generally described as of Caucasian/European descent.
What was Milly Alcock’s early role in Upright?
She played the lead role of Meg in the Foxtel comedy-drama Upright (2019-2022), alongside Tim Minchin. The role earned her an AACTA Award nomination.
How tall is Milly Alcock?
Milly Alcock’s height is commonly listed as 5 ft 5 in (165 cm).
What is Milly Alcock doing in 2025?
In 2025, she appeared in the Netflix limited series Sirens alongside Julianne Moore and Meghann Fahy.
Is Milly Alcock in a relationship?
She has been reported to be in a relationship with London-based chef Jo Powell since at least 2023, but she has not publicly confirmed this.
How old is Milly Alcock in 2025?
She is 25 years old in 2025, having been born on April 11, 2000.
What is Milly Alcock’s height?
Her height is 5 feet 5 inches (165 cm).
What movies has Milly Alcock been in?
Her film credits include The Reunion (2014), House of the Dragon (2022-2024), Sirens (2025), Superman (2025), and the upcoming Supergirl (2026).
Did Milly Alcock drop out of high school?
Yes, she dropped out of high school at age 18 to take the leading role in Upright after being offered the part.
When does Supergirl come out?
The Supergirl film starring Milly Alcock is scheduled for release on June 26, 2026.
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Diane Forbes leads fact-checking, source verification and corrections review at Southampton Wire.