Agnes O'Casey

Early life O'Casey is from Finsbury Park, London, the elder of two daughters of hospitality and retail workers. She is of Irish and a quarter Jewish descent; the playwright Seán O'Casey was her great-grandfather. Her paternal grandfather was of Lithuanian-Jewish heritage.

O'Casey has dyslexia and attended a Steiner School. Her family moved to Newton Abbot, Devon when she was 11. She studied art history and English literature at Edinburgh University for a year

Career After appearing in the music video for "Holy Show" by the Pillow Queens in 2020 and the Druid Theatre Company production of The Seagull in 2021, O'Casey made her television debut in the 1960s-set BBC One drama Ridley Road, starring as the lead character Vivien Epstein. This was followed by a supporting role as Emilie in the Starz adaptation of Dangerous Liaisons the next year.

In 2023, O'Casey made her feature film debut in Thaddeus O'Sullivan's comedy-drama The Miracle Club and Lisa Mulcahy's period drama Lies We Tell with David Wilmot. O'Casey received IFTA nominations for both performances in the supporting actress and lead actress categories respectively. She was attached to the film Longbourn.

In 2024 she made her British stage debut as she originated the role of Liz Gold in the acclaimed theatrical adaptation of The Spy Who Came in From the Cold by John le Carré, adapted by David Eldridge and directed by Jeremy Herrin. O’Casey played opposite Rory Keenan and John Ramm. The production was performed at the Minerva Theatre at Chichester Festival Theatre as part of the 2024 season. The production went on to move to the West End at @sohoplace in 2025. Theatre critics dubbed Agnes' performance "a striking breath of fresh air".

In 2026, O'Casey is starring in the Apple TV Soviet space race drama Star City as Irina Morozova, a member of the KGB's surveillance department.

She has an upcoming role in the BBC adaptation of John Le Carré's Legacy of Spies.

Filmography Film Year Title Role Notes 2023 The Miracle Club Dolly 2023 Lies We Tell Maud 2024 Small Things Like These Sarah Furlong

Television Year Title Role Notes 2021 Ridley Road Vivien Epstein Main role, miniseries 2022 Dangerous Liaisons Emilie Recurring role, 3 episodes 2024 Wolf Hall: The Mirror and the Light Meg Douglas Recurring role, 4 episodes 2024 Black Doves Dani Recurring role, 3 episodes 2026 Star City Irina Morozova Main role TBA Legacy of Spies Liz Gold

Music videos "Holy Show" (2020), Pillow Queens

Stage Year Title Role Notes 2021 The Seagull Lily Druid Theatre Company 2024 The Spy Who Came in from The Cold Liz Gold Chichester Festival Theatre

Awards and nominations Year Award Category Work Result Ref. 2024 Irish Film & Television Awards Lead Actress – Film Lies We Tell Supporting Actress – Film The Miracle Club