Alcock has been acting in her home country of Australia since her teenage years, before becoming a household name thanks to House of the Dragon. She played the young Princess Rhaenyra Targaryen in the first season of the Game of Thrones spin-off and received a Critics’ Choice Award nomination for her supporting turn.

Alcock emerged as one of the main contenders for the role of DC Universe earlier this month and beat out Emilia Jones and Meg Donnelly to win this role. James Gunn confirmed her casting on social media and said she perfectly embodies Kara Zor-El.

“Milly is a fantastically talented young actor, and I’m incredibly excited about her being a part of the DCU. Yes, I first became aware of her in House of the Dragon but I was blown away by her varied auditions and screen tests for Supergirl,” wrote Gunn on Instagram.

Alcock is expected to headline her own standalone movie Supergirl: Woman of Tomorrow, but it remains unclear if she’ll make her debut as Supergirl in next year’s Superman: Legacy.

Alcock has been acting in her home country of Australia since her teenage years, before becoming a household name thanks to House of the Dragon. She played the young Princess Rhaenyra Targaryen in the first season of the Game of Thrones spin-off and received a Critics’ Choice Award nomination for her supporting turn.

Alcock emerged as one of the main contenders for the role of DC Universe earlier this month and beat out Emilia Jones and Meg Donnelly to win this role. James Gunn confirmed her casting on social media and said she perfectly embodies Kara Zor-El.

“Milly is a fantastically talented young actor, and I’m incredibly excited about her being a part of the DCU. Yes, I first became aware of her in House of the Dragon but I was blown away by her varied auditions and screen tests for Supergirl,” wrote Gunn on Instagram.

Alcock is expected to headline her own standalone movie Supergirl: Woman of Tomorrow, but it remains unclear if she’ll make her debut as Supergirl in next year’s Superman: Legacy.