Costume designer Karen Eister's designs at the American Repertory Theater prior to The Marriage of Bette and Boo include An Evening of Beckett, Beckett Trio, Macbeth; the A.R.T. New Stages productions of Silence, Cunning, Exile, The Lost Boys, Claptrap, Two by Korder, and Mrs. Sorkin Presents … ; and for the A.R.T. New Stages premiere and 1987 mainstage production of The Day Room. Ms. Eister earned her MFA in design at New York University. After several years of freelancing for television, fashion, and theater, she returned to Cambridge, where she has been cutting and draping costumes for the A.R.T.