Milly Alcock

Milly Alcock is the Australian actress who made the world stop scrolling as young Rhaenyra Targaryen in House of the Dragon, and she's only just getting started.

By Alexandre Le Hégarat · datastats · Updated June 15, 2026

Who is Milly Alcock?

Millicent “Milly” Alcock was born on 11 April 2000 in Sydney, New South Wales, Australia. She began her acting career in Australian television, landing roles in series like Upright, The Gloaming, and Covid-19 Emergency. It was solid, working-actor stuff, but nothing that set the internet on fire.

That changed in 2022 when she was cast as the young Princess Rhaenyra Targaryen in HBO’s House of the Dragon, the Game of Thrones prequel. Her performance, fierce, wounded, and politically sharp, drew immediate comparisons to the best of the original series. She became a bona fide overnight sensation, the kind that takes years of work to build.

After House of the Dragon, Alcock was cast as Supergirl / Kara Zor-El in James Gunn’s rebooted DC Universe, set to appear in Superman (2025). That casting announcement alone confirmed she had vaulted into a different tier of Hollywood entirely.

She also appears in the Netflix thriller series Sirens (2025), starring alongside Julianne Moore, further cementing her range as an actress willing to take on wildly different projects in quick succession.

Alcock is notably private about her personal life, which, combined with her rapid rise, makes her one of the most searched young actresses on the internet right now.

People also ask

Alcock is originally from Sydney, Australia, but her career has taken her to the UK and the US for filming commitments. She has not publicly confirmed a permanent current address, and given her level of fame, that's a smart call.

Milly Alcock is Australian. She was born and raised in Sydney, New South Wales, and has spoken proudly about her Australian roots in interviews.

Milly Alcock was born on 11 April 2000, making her 25 years old as of April 2025. She is firmly a Gen Z star, which makes her trajectory all the more remarkable.

Milly Alcock is reported to be approximately 5 ft 3 in (160 cm) tall. She's one of those performers whose on-screen presence makes her feel much larger than her physical stature.

No verified, reliable figure for Milly Alcock's net worth has been publicly reported, so any specific number you see online is speculation dressed up as fact. What is known is that landing a lead role in a major HBO series followed by a flagship DC Universe film puts her in a very different financial bracket than most actors her age, but the exact figure is unconfirmed.

Alcock played the young version of Princess Rhaenyra Targaryen for the first several episodes of *House of the Dragon* Season 1. Her storyline covered Rhaenyra's youth, her fraught relationship with her father King Viserys, her bond and rivalry with Queen Alicent, and her early political battles as heir to the Iron Throne. The show then performed a significant time jump, and the adult Rhaenyra was taken over by Emma D'Arcy for the remainder of the series.

Nothing happened to Milly Alcock, she's very much thriving. Her exit from *House of the Dragon* was always planned as part of the show's time-jump structure, not a departure under any negative circumstances. Post-Dragon, she was cast as Supergirl in the DCU and appeared in Netflix's *Sirens* (2025), so her career is accelerating, not stalling.

Milly Alcock did not appear in *Game of Thrones*, she starred in *House of the Dragon*, the prequel spin-off series. Filming for Season 1 took place primarily in 2021, when she was 20–21 years old.

Milly Alcock has not publicly confirmed a current relationship. She keeps her personal life tightly guarded, and no partner has been reliably reported by credible outlets. Speculation runs rampant online, but nothing is confirmed.

No boyfriend has been publicly confirmed by Milly Alcock. She has been consistently private about her romantic life, and any names circulating online are unverified.

Milly Alcock has not made any public statement about her sexuality. Speculating beyond what she has chosen to share publicly would be overstepping, that's her story to tell, if and when she wants to.

Milly Alcock is 25 years old, having been born on 11 April 2000. She was just 21 when she filmed the role that made her famous.

Milly Alcock was 21 years old when she filmed *House of the Dragon* Season 1 in 2021, and 22 when it aired in 2022. Onscreen, she was portraying a teenage-to-young-adult Rhaenyra spanning several years of in-universe time.

She was 21 during filming and 22 when Season 1 premiered in August 2022. Her character, young Rhaenyra, is depicted across a roughly decade-long stretch of story, from teenager to young mother.

Alcock was 20–21 years old during principal photography for *House of the Dragon* Season 1, which took place throughout 2021. It was a career-defining role taken on at a remarkably young age.

Milly Alcock stands at approximately 5 feet 3 inches (around 160 cm). That's the widely reported figure, though she has not officially confirmed it herself.

Milly Alcock was 22 years old when *House of the Dragon* Season 1 aired in 2022. She was 21 during most of the actual filming the year prior.

Milly Alcock was 24–25 years old during the production and release of *Sirens* on Netflix in 2025. In the show itself, she plays a younger woman caught up in a high-tension drama alongside Julianne Moore.

No, Milly Alcock is not married. She is 25 years old and has not announced any engagement or marriage. Her personal life remains firmly off the public record by her own choice.

The most straightforward answer: she's grown up on camera. There's a visible difference between her early Australian TV work, her platinum-wigged Rhaenyra look in *House of the Dragon*, and her appearance in later projects and press appearances. Hair, styling, and the natural shift from early-20s to mid-20s accounts for most of it. Fans also often forget that the white Targaryen wig dramatically changes her look, without it, she barely resembles the character that made her famous.