Milly Alcock Opens Up About 'House of the Dragon' Doubts and 'Supergirl' Role

Milly Alcock Netflix's 'Sirens' Series Premiere, New York, USA - 20 May 2025
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Milly Alcock opens up about early doubts on “House of the Dragon” and her new role as Supergirl in the DC Universe.

Australian actress Milly AlcockMilly Alcock might look like she has it all together now, but her journey hasn’t always been smooth. During her visit to The Tonight Show, the Australian actress opened up about the early days of shooting House of the Dragon.

On just her second day, someone high up on set told her she needed an acting coach—a moment that made her question if she even belonged there. “It just confirmed everything that I kind of know to be true is that I’m not very good at my job,” she admitted, being totally honest about her self-doubt.

Things turned around quickly, though. Fans loved her as young Rhaenyra, and the show went on to win a Golden Globe. Now, Milly’s stepping into even bigger shoes—or a cape, to be exact. She just wrapped filming as Supergirl in Supergirl: Woman of Tomorrow, and she seemed genuinely excited.

Now, with House of the Dragon behind her and the Supergirl role ahead, Milly Alcock is taking on some of the biggest projects in film and TV, all while keeping it real about the ups and downs that come with the job.