Kate O'Flynn (born 1986) is a British actress known for her performance in National Theatre's production of Port, for which she received a Critics' Circle Theatre Award in 2013, as well as starring roles in plays A Taste of Honey in 2014, and The Glass Menagerie, for which she was nominated for a Laurence Olivier Award for Best Actress in 2017. She has appearances in the films Up There (2011) and Mr. Turner (2014), and television series such as Kingdom (2009), Landscapers (2021), Death in Paradise (2022), My Lady Jane (2024), and Widow's Bay (2026-present).

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Kate O'Flynn is a British actress recognized for her acclaimed stage performances at the National Theatre and television roles in series like Widow's Bay.
She is known for her Olivier-nominated stage work, appearances in Mike Leigh's Happy-Go-Lucky, and diverse roles across film and television.
She has a prominent association with the National Theatre through acclaimed productions such as Port and A Taste of Honey.