Luff, most recently seen on Broadway as Miss Honey in Matilda, replaces Tony Award nominee Montego Glover, who gave her final performance as Fantine Feb. 3.
The Broadway revival currently stars Alfie Boe as Jean Valjean and Hayden Tee as Javert. John Owen-Jones assumes the role of Valjean beginning March 1.
The cast also features Tony Award and Olivier Award nominee Gavin Lee as Thenardier, Rachel Izen as Madame Thenardier, Brennyn Lark as Eponine, Chris McCarrell as Marius, Alex Finke as Cosette and Wallace Smith as Enjolras.
Cameron Mackintosh’s Broadway production of Claude-Michel Schönberg and Alain Boublil’s Les Miserables plays the Imperial Theatre (249 West 45th Street).