The ace up Holy Days’ sleeve is the casting, with each nun played by a legend of stage and screen: Judy Davis as Sister Agnes, Miriam Margolyes as Sister Luke and Jacki Weaver as Sister Mary Clare. These folk are a rather unexciting lot, despite a clear desire to present young Brian (Elijah Tamati) as the emotional glue holding things together and the habit-wearing trio as hot-blooded eccentrics. View image in fullscreen Jacki Weaver, Miriam Margolyes and Judy Davis in Holy Days. In one scene, Sister Agnes lights up a cigarette (gasp!) From early on, one can sense it’s a question of when rather than if Holy Days will dissolve into cheese and wishy-washiness.