Susannah Winnifred Flood (born June 30, 1982) is an American actress known for her work in the theatre.
Early life and education Flood is the daughter of Peter Gosnell Flood, an acting teacher and lifetime member of the Actors Studio. Prior to his marriage to her mother, Virginia, he was married to musical theatre actress Betty Buckley from 1972 until 1979. Flood spent her early years in New York City and Los Angeles.
She studied English at the University of California, Berkeley and went on to earn a Master of Fine Arts in Acting from Brown University, graduating in 2007.
Career Flood is known for her work Off-Broadway, originating roles in new plays. In 2023, she originated the role of Caitlin in The Comeuppance by Branden Jacobs-Jenkins. In 2024, she played the role of Mina in Abe Koogler's Staff Meal.
She made her Broadway debut in 2016, playing the role of Dunyasha in The Cherry Orchard. In 2022, she returned to Broadway in the new play Birthday Candles, playing multiple roles. In 2025, Flood played the lead role of Lizzie in Liberation by Bess Wohl directed by Whitney White. Flood starred in the original Off-Broadway production from January 31, 2025, through March 30, 2025, continuing on to Broadway from October 8, 2025, until the play closed on February 1, 2026.
On television, she played Ann, the sister of Amy Schumer's character on Life & Beth and Kate Littlejohn in the television series For The People. On film, she played Dorothy in The Chronology of Water, directed by Kristen Stewart.
Acting credits Theater YearTitleRoleVenueRef.2012TribesSylvia (replacement)Off-Broadway, Barrow Street Theatre2013Mr. Burns, a Post-Electric PlayPerformerOff-Broadway, Playwrights Horizons2014Love and InformationOff-Broadway, New York Theatre Workshop2016The EffectConnieOff-Broadway, Barrow Street TheatreThe Cherry OrchardDunyashaBroadway, American Airlines Theatre2018NassimGuest PerformerOff-Broadway, Barrow Street Theatre2019Make BelievePerformerOff-Broadway, Second Stage Theatre2022Birthday CandlesAlice/ Madeline/ ErnieBroadway, Todd Haimes Theatre2023The ComeuppanceCaitlinOff-Broadway, Signature Theatre Company2024Staff MealMinaOff-Broadway, Playwrights HorizonsThe CounterKatieOff-Broadway, Laura Pels Theatre2025LiberationLizzieBroadway, James Earl Jones Theatre
Awards and nominations YearAwardCategoryWorkResultRef.2025Lucille Lortel AwardOutstanding Lead Performer in a PlayLiberationDrama Desk AwardEnsemble AwardNew York Drama Critics CircleBest Ensemble2026Drama League AwardDistinguished PerformanceTony AwardBest Performance by a Leading Actress in a Play
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