Amelia May Alcock born 11 April 2000 is an Australian actress She received an AACTA nomination for her performance in the Foxtel comedydrama Upright 20192022 She made her international debut as young Rhaenyra Targaryen in the HBO fantasy series House of the Dragon 2022 For the role Alcock was nominated for a Critics Choice Television Award for Best Supporting Actress in a Drama Series Alcock was named a 2018 rising star by the Casting Guild of Australia CGA