Milly Alcock

Entertainment

Milly Alcock

Milly Alcock is an Australian actor best known as Kara Zor-El in the 2026 DC Universe film Supergirl and as young Princess Rhaenyra Targaryen in House of the Dragon. She first appeared as Supergirl in an uncredited cameo in Superman.

Her other work includes the runaway teenager Meg in the Australian series Upright, which earned her an AACTA Award nomination, and Simone DeWitt in the Netflix miniseries Sirens.

Born in Sydney in 2000, she attended Newtown High School of the Performing Arts and left in 2018 when she was cast in Upright.

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