Ann "Annie" Castledine (26 February 1939 – 4 June 2016), was a British theatre director, teacher and dramaturg.
Described in The Guardian as "one of the arts world's best-known secrets" who "shaped some of the most influential players in British theatre" and had a "genius for doing work that is unfashionable".
Peter Brook described her as an "outstanding director of European classical and contemporary plays".She was regarded as an expert on the dramas of Bertolt Brecht, William Shakespeare, Anton Chekov and Henrik Ibsen, as well as being noted for her championing of new talent in British theatre and the arts, including work with new playwrights and the training of new directors.
In supporting the development of British theatre, she was often likened to Joan Littlewood – the "mother of modern (English) theatre".