Milly Alcock is an Australian actress who gained international recognition for her role as young Rhaenyra Targaryen in the HBO fantasy series House of the Dragon. She began her acting career in Australian television, appearing in series such as Wonderland and Janet King. Her breakout performance came in the 2018 series A Place to Call Home, where she played Emma Carvolth. She further established herself in the industry with roles in Fighting Season and the critically acclaimed series Upright. For her performance in Upright, she won the Casting Guild of Australia's Rising Stars of 2018 award. Alcock's portrayal of Rhaenyra Targaryen in 2022 earned her widespread critical acclaim and a nomination for the Critics Choice Television Award for Best Supporting Actress in a Drama Series. Before her major success, she worked as a dishwasher in a restaurant while auditioning for roles. She has been noted for her ability to convey complex emotions and depth in her characters. In 2024, it was announced that she was cast as Supergirl in the DC Universe film Supergirl: Woman of Tomorrow. She continues to be one of the most promising young talents in the entertainment industry. Her work spans across both television and film, showcasing her versatility as a performer.