Milly Alcock

Biography

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 is best known for portraying Kara Zor-El / Supergirl in the DC Universe, first making an uncredited appearance in Superman (2025). She reprised the role starring in Supergirl (2026).

Known For

House of the Dragon

as Young Rhaenyra Targaryen

Superman

as Supergirl (uncredited)

Supergirl

as Supergirl

The Tonight Show Starring Jimmy Fallon

as Self - Guest

Sirens

as Simone DeWitt

Upright

as Meg Adams

Pine Gap

as Marissa Campbell

Reckoning

as Sam Serrato

The Gloaming

as Jenny McGinty

A Place to Call Home

as Emma Carvolth