Milly Alcock Bio, Age, Height, Boyfriend, Supergirl, House of the Dragon, Net Worth, Movies, Career & Facts

Milly Alcock is one of the most exciting young actresses to emerge from Australia in recent years, having skyrocketed from washing dishes in a Sydney café to leading a major DC superhero franchise. From her breakout role as young Princess Rhaenyra Targaryen in HBO’s House of the Dragon to suiting up as Kara Zor-El / Supergirl in James Gunn’s rebooted DC Universe, the 26-year-old has proven herself a versatile talent capable of commanding both prestige television and blockbuster cinema. Her journey from a public school in Sydney’s inner west to the West End stage and Hollywood’s biggest franchises is a testament to raw talent, fierce determination, and a refreshingly grounded perspective on fame.

Quick Facts

Early Life & Education

Amelia May Alcock was born on April 11, 2000, in the Sydney suburb of Petersham, in New South Wales, Australia. She grew up in a decidedly non-arty family with her parents and two younger brothers, in what she describes as a working-class household. “The arts felt like something that was just mine, that I had ownership over,” she explained in a Harper’s Bazaar interview. “I really held onto that as a sense of independence and something I could call my own, I was very protective about it.”

Her first taste of acting came in an unlikely place — playing Little Red Riding Hood in Taverners Hill Infants School’s version of Little Red Rocking Hood. She attended Stanmore Public School before transferring to Newtown High School of the Performing Arts at age 13, a prestigious institution whose alumni include Sophie Wilde and Odessa Young.

When she arrived at Newtown, she discovered most of her classmates already had agents. So she took matters into her own hands: “I started googling agencies and calling them saying, ‘Hi, can you hire me?’ Eventually one did. I think I was literally about 13 at the time,” she told Harper’s Bazaar.

Career Journey

Early Beginnings (2014–2018)

Alcock’s career started with small but steady work. She appeared in commercials for NBN, Cadbury, KFC, and Woolworths, and presented on Disney Channel Australia’s short-form series B.F. Chefs and Hanging With from 2015 to 2017. Her first credited acting role came in 2014 with a guest spot on Network Ten’s Wonderland.

In 2017, she landed her first named roles: Isabella Barrett in the web miniseries High Life alongside Odessa Young, and Cindi Jackson in the ABC drama Janet King. The following year brought more recurring roles in Fighting Season, A Place to Call Home, Pine Gap, and Les Norton. She also made her feature film debut in The School (2018).

Upright: The Breakthrough (2019–2022)

Alcock’s first major breakthrough came in 2019 when she was cast as Meg, a runaway teenager hitchhiking across 2,000 miles of Australian outback, in the Foxtel comedy-drama Upright alongside Tim Minchin. The role required her to drop out of high school in her senior year — a decision her mother enthusiastically supported: “She’s like, ‘Who cares? It doesn’t matter!’ She’s fabulous,” Alcock recalled.

The performance earned her a nomination for Best Comedy Performer at the 10th AACTA Awards, making her one of the youngest nominees in the category. She also won the Casting Guild of Australia Rising Star Award in 2018. Upright was the project that caught the attention of the House of the Dragon casting team — and during this period, she was still washing dishes at a popular Sydney restaurant. “I was literally washing dishes every day. Nobody knew!” she told Harper’s Bazaar.

House of the Dragon: Global Stardom (2022–2024)

In July 2021, Alcock was cast as young Princess Rhaenyra Targaryen in HBO’s House of the Dragon, the highly anticipated Game of Thrones prequel based on George R.R. Martin’s Fire and Blood. She was 20 years old at the time and had never lived outside Australia. She moved to London during the UK’s pandemic lockdown, knowing no one, to film what she called “potentially the biggest TV show ever.”

Her performance was universally acclaimed. CNET’s Daniel van Boom wrote: “The shining star of House of the Dragon’s opening episodes is surely Milly Alcock as Rhaenyra. She’s got an enchantingly expressive face — a simple squinting of the eyes or a pursing of the lips can betray the range of emotions that accompany king’s court politics.” The role earned her a Critics’ Choice Television Award nomination for Best Supporting Actress in a Drama Series and a Critics’ Choice Super Award nomination for Best Actress in a Science Fiction/Fantasy Series. Her Instagram following exploded from 40,000 to over 1 million in just five episodes.

She made a guest return as young Rhaenyra in Season 2 (2024) and also appeared in the music video for Noel Gallagher’s High Flying Birds’ “Easy Now” (2023), starring alongside Anaïs Gallagher, a close friend.

West End Stage Debut (2023)

In June 2023, Alcock made her West End stage debut as Abigail Williams in the National Theatre’s production of The Crucible at the Gielgud Theatre in London — a bold choice that showcased her range beyond screen acting.

Sirens & The Supergirl Era (2024–2026)

In 2025, Alcock starred alongside Julianne Moore and Meghann Fahy in Netflix’s dark comedy limited series Sirens, playing Simone DeWitt, a social climber whose Lilly Pulitzer clothes mask ruthless ambition. The role was a deliberate departure from fantasy — “I’m not doing any fantasy roles. I don’t want to do anything like that. I have done it and I don’t need to do it again,” she had told the Herald Sun.

But then came the call that would change everything. In January 2024, James Gunn announced Alcock had been cast as Kara Zor-El / Supergirl in the rebooted DC Universe. She first appeared in an uncredited cameo in Superman (2025), drunkenly stumbling into frame before the credits — a scene designed to introduce this “messy” new version of Supergirl.

Supergirl (2026), directed by Craig Gillespie (I, Tonya), was released on June 26, 2026. The film is based on Tom King’s comic series Supergirl: Woman of Tomorrow and co-stars Jason Momoa as Lobo, Matthias Schoenaerts as the villain Krem, and Eve Ridley as Ruthye. Reviews were mixed — critics praised Alcock’s performance but criticized the script and villain — though she was widely hailed as the film’s saving grace. “Milly Alcock is exceptional in a movie that’s otherwise disappointing,” wrote critic Nikko Caruso.

Upcoming Projects

Alcock has a packed slate ahead:

• Superman: Man of Tomorrow (filming): Reprising her role as Supergirl
• Thumb (post-production): An indie dark comedy directed by Daina Oniunas-Pusić, co-starring Sofía Vergara and Kate McKinnon
• Untitled Takashi Miike horror film: Shot in Japan with Charli xcx
• The Summer Oath (2026)

Career Stats & Filmography

Personal Life

Family

Alcock grew up in Sydney’s inner west with her parents and two younger brothers. She is particularly close to her mother, whom she wished could have attended the House of the Dragon premiere in London. “My family can’t come over. And it’s just, I really wish my mum could be here, because this might never happen again. So it’s kind of bittersweet … things like this don’t happen to people like me,” she told The Standard.

She has a Persian cat named Guinness, who frequently appears on her Instagram alongside her boyfriend.

Relationships

As of early 2026, Milly Alcock is in a relationship with Joseph “Jo” Powell, a professional chef and founder of the culinary brand Schoolnights. The pair were first linked in 2025 through social media activity before making their public debut during awards season. They live together in London with Guinness.

Before Powell, Alcock kept her dating life extremely private. She was briefly linked to Luca Ward and Ari Kwasner-Catsi in 2019 after sharing photos with them on Instagram, but never confirmed any relationships. She was also spotted with actor Ruper Fennessy in Manhattan’s East Village in 2025, though this was never confirmed as romantic.

Lifestyle & Interests

Fashion: Alcock has become a fashion darling, sitting front row at Louis Vuitton and Fendi shows in Paris. She works with stylist friends and has a bold, eclectic style.

Music: She became a punk fan thanks to House of the Dragon co-stars Paddy Considine and Rhys Ifans, who introduced her to Australian punk band Amyl and the Sniffers. She also starred in Noel Gallagher’s “Easy Now” music video.

Privacy: Despite her rising fame, Alcock maintains a refreshingly private approach to celebrity. “The goal for me with acting has never been to be famous, or to be a movie star,” she told Harper’s Bazaar. “I think that’s emotionally taxing. It’s not what I strive for at all.”

Controversies

Alcock has largely avoided major controversies, though Supergirl‘s press tour generated some friction. In June 2026, reports surfaced of “questionable remarks” during promotional interviews that coincided with declining box office projections for the film. Some critics and outlets drew comparisons to the “Snow White” debacle, suggesting her comments may have contributed to softening audience interest. However, these reports were largely driven by conservative media outlets and remain disputed. The film’s mixed reviews and challenging box office performance appear more attributable to script issues and DC Universe fatigue than to Alcock’s conduct.

Awards & Achievements

Physical Statistics

Quotes

“I looked at myself in the mirror, and I was like, ‘Who am I to turn down this opportunity?’ I knew that it was what I needed to do, because it scared me. And I thought, ‘Well, I get one big, bad, beautiful life. Why not fucking go for it?'” — On accepting the Supergirl role, Variety (2026)

“The goal for me with acting has never been to be famous, or to be a movie star. I think that’s emotionally taxing. It’s not what I strive for at all.” — Harper’s Bazaar (2023)

“My personal experience of being Milly mirrored Kara’s experience, which was ‘Hide. Run away. Pretend it’s not happening.’ And then you have to face it to heal a part of yourself that you’ve been neglecting.” — On relating to Supergirl’s trauma, Variety (2026)

“I was literally washing dishes every day. Nobody knew!” — On keeping her café job after landing House of the Dragon, Harper’s Bazaar

“Things like this don’t happen to people like me.” — On her House of the Dragon premiere, The Standard

“I had an inability to express myself fully within my life. Within my relationships, I would hold things back. And acting gave me this outlet that was really safe where I could feel everything.” — On how acting changed her, Variety (2026)

Favorites

Earnings & Net Worth

Milly Alcock’s net worth is estimated at approximately $2 million as of 2026, according to Celebrity Net Worth and other financial sources. This figure reflects her rapid rise from Australian television to Hollywood blockbuster leading roles.

Income Breakdown

Her social media following has grown significantly since House of the Dragon, with Instagram being her primary platform. She has approximately 1.9 million Instagram followers and 31.4K TikTok followers as of 2026.

Interesting Facts

• Dropped Out of High School: Left Newtown High School of the Performing Arts in her final year to star in Upright — with her mother’s full support.
• Dishwasher to Supergirl: Kept her job washing dishes at a Sydney café even after landing House of the Dragon.
• Self-Represented at 13: Found her own agent by cold-calling agencies at age 13.
• Besties with Anaïs Gallagher: Close friends with Noel Gallagher’s daughter; starred in his “Easy Now” music video.
• Fifth Live-Action Supergirl: The fifth actress to portray Kara Zor-El in live-action and the third in film.
• West End Debut: Played Abigail Williams in The Crucible at the Gielgud Theatre in 2023.
• From 40K to 1M Followers: Her Instagram exploded from 40,000 to over 1 million followers during House of the Dragon Season 1.
• Lives in London: Has made London her home since filming House of the Dragon, living with her boyfriend and cat.
• No Fantasy Repeat: Publicly stated she didn’t want another fantasy role after House of the Dragon — then accepted Supergirl because “it scared me.”
• Takashi Miike Collaboration: Filmed an untitled horror movie with legendary Japanese director Takashi Miike and Charli xcx in Kyoto.

Did You Know?

• Milly Alcock was one of the youngest nominees ever for the AACTA Best Comedy Performer award.
• She has never tested for a role in person before her Supergirl audition — her House of the Dragon casting was done entirely over Zoom due to pandemic restrictions.
• James Gunn emailed her from the set of Superman to tell her she got the Supergirl role, sending her a link to a news article announcing the casting.
• She filmed Upright Season 2 immediately after wrapping House of the Dragon Season 1, giving her no time to process her sudden fame.
• She describes her emotional dysregulation as “the best thing about me” when it comes to acting.

Social Media Links

• Instagram: @millyalcock — ~1.9 million followers
• TikTok: @milly.alcock — ~31.4K followers
• IMDb: nm6854116

Frequently Asked Questions

How old is Milly Alcock in 2026?
Milly Alcock was born on April 11, 2000, making her 26 years old as of 2026.

What is Milly Alcock’s real name?
Her birth name is Amelia May Alcock, though she goes by Milly professionally and personally.

How tall is Milly Alcock?
She stands at 5 feet 5 inches (1.65 meters).

Who is Milly Alcock dating?
As of early 2026, she is in a relationship with Joseph “Jo” Powell, a professional chef and founder of Schoolnights.

Is Milly Alcock Australian?
Yes, she was born and raised in Sydney, Australia, specifically in the suburb of Petersham.

What is Milly Alcock famous for?
She is famous for playing young Princess Rhaenyra Targaryen in HBO’s House of the Dragon and for being cast as Supergirl in James Gunn’s DC Universe.

What is Milly Alcock’s net worth?
Her estimated net worth is approximately $2 million as of 2026.

Did Milly Alcock finish high school?
No, she dropped out in her final year to take the lead role in Upright (2019).

What movies has Milly Alcock been in?
Her film credits include The School (2018), Superman (2025, cameo), Supergirl (2026), Thumb (TBA), and The Summer Oath (2026).

Will Milly Alcock return as Supergirl?
Yes, she is confirmed to reprise the role in Superman: Man of Tomorrow and potentially future DCU projects.

Conclusion

Milly Alcock’s journey from a Sydney public school to the heights of Hollywood is one of the most compelling breakout stories in recent entertainment history. She didn’t wait for permission — she found her own agent at 13, dropped out of school to chase a dream, and kept washing dishes even after landing the biggest TV show on the planet. Now, as Supergirl, she stands at the center of one of Hollywood’s most ambitious franchise reboots, all while maintaining the grounded, fiercely independent spirit that got her there.

Whether she’s playing a dragon-riding princess, a punk-rock superhero, or a social-climbing minion in a dark comedy, Alcock brings the same fearless authenticity. As she told Variety: “I get one big, bad, beautiful life. Why not fucking go for it?”

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