Thaddea Graham
Thaddea Graham is an actor, born 1997.
Thaddea Graham was born in China in 1997 and is Northern Irish, and the accent is part of what got her noticed: it arrives with a specificity most young actors spend years trying to manufacture. Her early credits are almost all British television with genre in the bloodstream. Curfew in 2019, then The Letter for the King, then Bea in The Irregulars, which put her at the centre of a Netflix series and asked her to hold a young ensemble together as both its leader and its conscience.
The interesting move was what came next, which was not more of the same. She joined Sex Education for its 2023 season as Sarah Owens, played Una Houlihan in the 2024 run of Bad Sisters, appeared in Us and Wreck, and turned up in Doctor Who during its 2021 run, which is not among the credits listed here. That is four very different registers inside five years: fantasy adventure, teen comedy, Irish black comedy, and family science fiction.
Since then the rooms have got bigger. Katie in After the Hunt and Meg in Jay Kelly, both in 2025, put her in film casts several tiers above where she started, and Margo's Got Money Troubles follows in 2026. The career is early and the parts are still growing, but the useful thing to note is that nothing on the list looks like anything else on it.
Movies (3)
TV (4)
Where to start with Thaddea Graham
Bea in The Irregulars is where to start, because it is the only thing here where the whole show rests on her. She has to be tough enough to run a gang and young enough for the story to carry any stakes, and Graham plays the second half of that better than most leads her age manage.
Sex Education is the higher-profile credit and a different test entirely: she enters an established, much-loved cast late in its run and has to be interesting immediately, without any accumulated goodwill from the audience. She manages that too.
For the adult drama, Bad Sisters gives her a smaller part in a very well-made ensemble, while After the Hunt and Jay Kelly are the step up into film, both from 2025. Margo's Got Money Troubles and Artificial are what comes next.