Thaddea Graham (born 17 September 1997) is a Northern Irish actress. She is known for her roles in the series Curfew (2019), The Letter for the King (2020), The Irregulars (2021), Sex Education (2023),Us (2020), Doctor Who: Flux (2021) and Wreck (2022).

Graham appeared on the 2023 Screen International Rising Stars Ireland list.

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