Milly Alcock Biography: Age, Height, Supergirl Movie & Jo Powell Relationship, Career, Net Worth, in 2026

Milly Alcock stands out as one of Australia’s brightest young talents who has taken Hollywood by storm. The Sydney-born actress first captured global attention as young Princess Rhaenyra Targaryen in HBO’s House of the Dragon. She now headlines major projects in the DC Universe as Supergirl. In 2026, Alcock brings fresh energy to the superhero genre with the standalone Supergirl film while balancing her rising profile and personal life in London.

Quick Facts

Full Name	Amelia May “Milly” Alcock
Profession	Actress
Date of Birth	April 11, 2000
Age	26 years old
Birthplace	Sydney, New South Wales, Australia (Petersham suburb)
Nationality	Australian
Ethnicity	Caucasian
Zodiac Sign	Aries
Height & Weight	5 ft 5 in (165 cm); approximately 99 lbs (45 kg) – slim athletic build
Hair Color	Blonde (often styled brunette for roles)
Eye Color	Blue
Education	Newtown High School of the Performing Arts (dropped out in final year for acting)
Religion	Not publicly specified
Sexual Orientation	Straight
Marital Status	In a relationship
Partner	Jo Powell (chef and founder of Schoolnights food project)
Children	None
Parents	Emma Alcock (mother); father details private
Siblings	Two younger brothers (one named Bert Alcock)
Known For	Young Rhaenyra Targaryen in House of the Dragon, Supergirl in DC Universe (Superman cameo and Supergirl lead)
Net Worth (2026)	$2 million
Years Active	2013–present
Current Residence	London, England
Current Work	Starring as Supergirl in Supergirl (June 2026 release), upcoming dark comedy Thumb, fashion and red-carpet appearances

Early Life & Education

Childhood

Milly Alcock was born Amelia May Alcock on April 11, 2000, in the Sydney suburb of Petersham. Raised primarily by her mother Emma, who worked as a nanny, Alcock grew up in a creative but grounded household. She discovered acting early, landing her first role as Little Red Riding Hood in a school play at age five or six. Her mother and family encouraged her passion, though she describes herself as the only artistic one among her siblings. The middle-class environment kept her focused on local opportunities before global fame arrived.

School Years

Alcock attended Newtown High School of the Performing Arts starting at age 13. The specialized program nurtured her talent through theater, music, and performance training. She balanced academics with early acting gigs but struggled in traditional school subjects due to dyslexia, a trait she shares with her mother. These years built her confidence and work ethic in the performing arts.

University & Training

She did not attend university. In her final year of high school, Alcock dropped out to accept a full-time role in the Australian series Upright (2019). This leap of faith paid off and launched her professional career without formal higher education. She gained practical experience through on-set work and self-taught preparation for auditions.

Career Journey

Milly Alcock built her career from Australian television to international stardom through steady roles and breakout performances. She started with local shows and commercials before House of the Dragon made her a household name. Her transition to blockbuster franchises in 2026 shows her range and ambition.

Career Beginnings

Alcock began acting professionally around age 13 with small roles in Australian TV series like Janet King, A Place to Call Home, and Fighting Season. She appeared in the thriller Reckoning and earned an AACTA Award nomination for her work in the comedy-drama Upright opposite Tim Minchin. These early credits honed her skills while she juggled side jobs, including washing dishes at a café in Marrickville.

Breakthrough and Global Fame

Her performance as young Rhaenyra Targaryen in House of the Dragon Season 1 (2022) brought worldwide recognition. The role showcased her ability to portray strength, vulnerability, and leadership. Fans and critics praised her chemistry with the cast, and the experience prepared her for intense public scrutiny in future projects.

Independent Projects and Growth

After House of the Dragon, Alcock starred in the 2025 Netflix miniseries Sirens. She took on more varied roles that highlighted her versatility beyond fantasy. She also performed on stage, including playing Abigail Williams in The Crucible at London’s Gielgud Theatre.

2025–2026: Recent Activity and New Horizons

In 2025, Alcock made her DC Universe debut with a cameo as Kara Zor-El / Supergirl in Superman. She addresses fan expectations head-on while preparing for the lead role in Supergirl, set for release on June 26, 2026. The film, directed by Craig Gillespie, explores a darker take on the character. She also films the dark comedy Thumb, where she plays a reclusive woman whose life changes after receiving a mysterious severed thumb. These 2026 projects mark her shift into major superhero territory while she maintains a grounded approach to fame.

Career Stats / Filmography Highlights

2019: Upright – Meg (breakout Australian role)
2022: House of the Dragon – Young Rhaenyra Targaryen (global fame)
2025: Sirens (Netflix miniseries lead); Superman – Supergirl cameo
2026: Supergirl – Kara Zor-El / Supergirl (lead, theatrical release June 26)
Upcoming: Thumb (dark comedy)

Alcock has earned critical praise, award nominations, and strong streaming and box-office impact in a short time.

Net Worth & Earnings

Milly Alcock’s net worth stands at an estimated $2 million in 2026. Her income comes from acting salaries on major series and films, including high-profile DC Universe paydays. Early Australian TV work, endorsements, and fashion campaign appearances add to her earnings. She lives modestly in London and focuses resources on career growth rather than lavish displays.

Personal Life

Family Background

Alcock maintains close ties with her Sydney-based family. Her mother Emma played a key supportive role in her early career. She has two younger brothers, including Bert Alcock, and describes her upbringing as loving but ordinary. The family values privacy, and she often credits them for keeping her grounded.

Relationships & Dating History

Alcock kept her early romantic life private with only unconfirmed rumors in her teens. She has spoken little about past relationships in interviews.

Marriage & Spouse / Children

She is not married and has no children. As of 2026 she is in a committed relationship.

Hobbies, Interests & Lifestyle

Alcock enjoys a low-key life in London. She loves travel, fashion (frequently attending Paris Fashion Week events), and spending time with her kitten. She remains active on social media but prioritizes authenticity over constant posting. Her Australian roots influence her straightforward personality and work ethic.

Controversies & Legal Issues

Milly Alcock maintains a positive, professional reputation with no major controversies or legal issues. She has openly discussed the pressure of fan scrutiny after House of the Dragon and addresses potential backlash for Supergirl with maturity and confidence.

Awards & Achievements

AACTA Award nomination for Upright
Critical acclaim for House of the Dragon breakout role
Forbes recognition as a rising star
DC Universe casting as Supergirl (major franchise milestone)

Physical Statistics

Milly Alcock stands 5 ft 5 in (165 cm) tall with a slim, athletic build around 99 lbs (45 kg). She stays fit through an active lifestyle and role-specific training. Her natural presence shines on screen and red carpets.

Interesting Facts

She dropped out of high school in her final year for the role in Upright.
Alcock lived in her mother’s attic and worked café jobs before House of the Dragon.
She idolizes Australian actors like Cate Blanchett, Rose Byrne, and Sarah Snook.
Her Supergirl role follows a deliberate choice to return to a big franchise after swearing off them post-House of the Dragon.
She hard-launched her relationship on Instagram in June 2025 with a photo of her boyfriend in an “I Love My Girlfriend” shirt.
Alcock performed in London theater while building her international career.
She has a black Persian kitten that resembles soot sprites from Spirited Away.
Fans note her petite frame suited the young Rhaenyra role perfectly.
She balances Hollywood projects with a desire for normalcy in London.

Did You Know?

Did you know Milly Alcock dropped out of high school to star in the Australian series Upright?
Did you know she plays Supergirl in the 2026 DC film releasing June 26?
Did you know she made her DC debut with a cameo in Superman (2025)?
Did you know she went public with her chef boyfriend Jo Powell in summer 2025?
Did you know she grew up in the Sydney suburb of Petersham?

Instagram: @millyalcock (official account sharing career updates, travel, and personal moments)

Frequently Asked Questions

Q1: How old is Milly Alcock?
Born April 11, 2000, she is 26 years old years old in 2026.

Q2: What is Milly Alcock’s height?
She stands 5 ft 5 in (165 cm) tall.

Q3: Who is Milly Alcock dating in 2026?
She is in a relationship with London-based chef Jo Powell.

Q4: What is Milly Alcock’s net worth in 2026?
Her estimated net worth is $2 million from acting and endorsements.

Q5: What is Milly Alcock working on in 2026?
She stars as Supergirl in the standalone film releasing June 26, 2026.

Conclusion

Milly Alcock has risen from Australian television and school plays to leading roles in major franchises with remarkable speed and grace. Her authentic performances in House of the Dragon and upcoming Supergirl in 2026 continue to win fans while she stays true to her roots. Share this article with fellow fans and follow her exciting journey in film and beyond.