Deborah Warner CBE (born 12 May 1959) is a British director of theatre and opera, known for her interpretations of the works of Shakespeare, Bertolt Brecht, Benjamin Britten, and Henrik Ibsen, and for her collaborations with Irish actress Fiona Shaw.

[4] Warner has since the 1980s worked in close creative partnership with the actor Fiona Shaw, developing a wide range of projects that have been seen throughout Europe and the United States.

Although she has refused to subscribe to a programmatic feminism or a political ideology, her work has often explored issues of gender, notably in her ground-breaking casting of Fiona Shaw as Shakespeare's Richard II.

In 1987 Warner joined the Royal Shakespeare Company, where she directed Titus Andronicus and where she also began her long-time collaboration with Fiona Shaw.

[citation needed] In 2007, following negotiations with the Beckett estate, Warner directed Shaw in Happy Days at the National Theatre, which toured internationally including at the ancient amphitheatre at Epidaurus in Greece and Brooklyn Academy of Music in New York, followed in 2009 by Mother Courage and Her Children (with Shaw in the title role) at the Olivier Theatre at the National.