Fionnghuala Manon "Fionnula" Flanagan (born 10 December 1941) is an Irish actress and political activist.
Flanagan was born and raised in Dublin, the daughter of Rosanna (née McGuirk) and Terence Niall Flanagan. Her father was an Irish Army officer and Communist who had fought in the International Brigade in the Spanish Civil War against Franco. Although her parents were not Irish speakers, they wanted Fionnula and her four siblings to learn the Irish language, thus she grew up speaking English and Irish fluently. She was educated in Switzerland and England. She trained extensively at the Abbey Theatre in Dublin and travelled throughout Europe before settling in Los Angeles in early 1968.
Flanagan came to prominence in Ireland in 1965 as a result of her role as Máire in the Telefís Éireann production of the Irish language play An Triail, for which she received the Jacob's Award in Dublin for her "outstanding performance". With her portrayal of Gerty McDowell in the film version of Ulysses (1967), Flanagan established herself as one of the foremost interpreters of James Joyce. She made her Broadway debut in Brian Friel's Lovers (1968), then appeared in The Incomparable Max (1971) and such Joycean theatrical projects as Ulysses in Nighttown (as Molly Bloom) and James Joyce's Women (1977; toured through 1979), a one-woman show written by Flanagan and directed for the stage by Burgess Meredith. It was subsequently filmed in 1983, with Flanagan both producing and playing all six main female roles (Joyce's wife, Nora Barnacle, as well as fictional characters Molly Bloom, Gerty McDowell, etc.).