Biography
Thaddea Graham is a Northern Irish actress. She trained at Arts Educational Schools in London, graduating with a BA in Acting in 2018.
She is known for television roles including Iona in the Netflix series The Letter for the King (2020), Bea in The Irregulars (2021), Sarah 'O' Owens in Sex Education (2023), Bel in Doctor Who (2021), Una Houlihan in Bad Sisters (2022 and 2024), and Susie in Margo's Got Money Troubles (2026). Her film credits include Katie in After the Hunt (2025) and Meg in Jay Kelly (2025).
Graham appeared on the 2023 Screen International Rising Stars Ireland list. She was adopted from an orphanage in Changsha, China, at one year old and raised in County Down.
