Amelia May Alcock (born 11 April 2000) is an Australian actress. She received an AACTA Award nomination for her performance in the Foxtel comedy-drama Upright (2019–2022). She gained wider recognition for starring as young Rhaenyra Targaryen in the HBO fantasy series House of the Dragon (2022–2024), for which she was nominated for a Critics' Choice Award.
Alcock portrays Kara Zor-El / Supergirl in the DC Universe, first making an uncredited appearance in Superman (2025). She reprised the role starring in Supergirl (2026).
Early life Amelia May Alcock was born on 11 April 2000 and raised in the Sydney suburb of Petersham. She has two younger brothers. Alcock was introduced to acting upon playing Little Red Riding Hood in Taverners Hill Infants School's version of Little Red Rocking Hood. She attended the local Stanmore Public School and then Newtown High School of the Performing Arts, from where she dropped out in 2018 when she was cast in Upright. She is the sister of rugby union player Albert Alcock.
Career Alcock made her television debut as a teenager in a 2014 episode of the Network Ten romantic comedy Wonderland. She appeared in commercials for NBN, Cadbury, KFC, and Woolworths. She starred on Disney Channel in Australia from 2015 to 2017, presenting on the short-form series B.F. Chefs and Hanging With. In 2017, Alcock landed her first named roles as Isabella Barrett in the web miniseries High Life alongside Odessa Young and Cindi Jackson in the third and final series of the ABC Television drama Janet King.
The following year, Alcock played Maya Nordenfelt in the Showcase drama Fighting Season. She also appeared in the sixth and final series of A Place to Call Home as Emma Carvolth, the Netflix series Pine Gap as Marissa Campbell, and the ABC series Les Norton as Sian Galese. In 2018, Alcock appeared in her first feature film The School.
In 2019, Alcock began starring in the Foxtel comedy-drama series Upright as runaway teenager Meg, hitchhiking across of the Australian outback, a contributing factor to her being presented with a Casting Guild of Australia Rising Star Award 2018. For her performance, Alcock was nominated for Best Comedy Performer at the 10th AACTA Awards, making her one of the youngest nominees in the category. Alcock returned for Upright second series in 2022. She also had supporting roles as Jenny McGinty and Sam Serrato in the series The Gloaming and Reckoning, respectively.
In July 2021, it was announced Alcock had been cast as young Princess Rhaenyra Targaryen (later played by Emma D'Arcy) in the 2022 HBO fantasy series House of the Dragon, a Game of Thrones prequel and adaptation of George R. R. Martin's fictional history book Fire and Blood. Alcock garnered critical acclaim and was considered a highlight; Daniel van Boom for CNET 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." For the role, Alcock received a nomination for Critics' Choice Television Award for Best Supporting Actress in a Drama Series.
In January 2023, Alcock appeared in the music video for the song "Easy Now" by Noel Gallagher's High Flying Birds from the band's fourth album Council Skies. She made her West End stage debut in The Crucible at the Gielgud Theatre in June.
In 2025, she starred alongside Julianne Moore and Meghann Fahy in the Netflix dark comedy limited series Sirens.
In January 2024, it was announced that Alcock had been cast to play Kara Zor-El / Supergirl in the DC Universe film Supergirl, first making an uncredited appearance as the character in Superman (2025). Supergirl released on 26 June 2026, opening to mixed reviews and underperformed at the box-office; however, Alcock was praised for her performance. Alcock will reprise her role in the upcoming film Man of Tomorrow.
Personal life Prior to being cast in House of the Dragon, Alcock lived with her family in Sydney and took on side jobs. Harper's Bazaar Australia reported that she worked part time at a cafe in Sydney's Marrickville until filming began. In 2022, she relocated to London.
In 2026, Alcock revealed that she had been diagnosed with ADHD.
Filmography
Film Year Title Role Notes 2018 The School Jien 2025 Superman Kara Zor-El / Supergirl Uncredited cameo 2026 Supergirl 2027 Post-production rowspan="2" Post-production Filming
Television Year Title Role Notes 2014 Wonderland Teen Girl 1 Episode: "Narcissism" 2015–2016 B.F. Chefs Herself Presenter 2017 Hanging With Herself Presenter Janet King Cindi Jackson Recurring role (series 3) 2018 A Place to Call Home Emma Carvolth Recurring role (series 6) Fighting Season Maya Nordenfelt Recurring role Pine Gap Marissa Campbell Limited-run series, main cast 2019 Les Norton Sian Galese Recurring role 2019–2022 Upright Meg Adams Main cast 2020 The Gloaming Jenny McGinty Recurring role Reckoning Sam Serrato Recurring role 2022–2024 House of the Dragon Young Princess Rhaenyra Targaryen Main cast (season 1)Guest cast (season 2); 7 episodes 2025 Sirens Simone DeWitt Miniseries, main cast
Web Year Title Role Notes 2017 High Life Isabella Barrett Miniseries; 6 episodes2026Royal CourtGuestEpisode: "Milly Alcock Joins Brittany Broski's Royal Court"
Music videos Year Track Artist Role 2023 Easy Now Noel Gallagher's High Flying Birds Main Girl
Theatre Year Title Role Venue(s) 2023 The Crucible Abigail Williams Gielgud Theatre, West End, London
Awards and nominations
Year Association Category Work Result Casting Guild of Australia Rising Stars of 2018 Television career AACTA Awards Best Comedy Performer Upright IGN Summer Movie Awards Best Performance in a TV SeriesHouse of the Dragon Critics' Choice Television Awards Best Supporting Actress in a Drama Series Critics' Choice Super Awards Best Actress in a Science Fiction/Fantasy Series Logie Awards Most Outstanding Actress Upright Saturn Awards Best Performance by a Younger Actor on a TV Series House of the Dragon Critics' Choice Super AwardsBest Actress in a Superhero MovieSupergirl
References
External links