Jessica Raine Jenny Lee Actor Jenny Agutter Sister Julienne Actor Pam Ferris Sister Evangelina Actor Judy Parfitt Sister Monica Joan Actor Helen George Trixie Franklin Actor Bryony Hannah Cynthia Miller Actor Miranda Hart Chummy Browne Actor Vanessa Redgrave Mature Jenny (voice) Guest Star Emerald Fennell Patsy Mount Guest Star Alexander Perkins Milkman Guest Star Simon Darwen Ted Guest Star Tommy French Police Constable at Birth Guest Star Victoria Yeates Sister Winifred Guest Star Ben Caplan Sgt. Peter Noakes Guest Star Charlotte Ritchie Barbara Gilbert Guest Star Thaddeus O'Sullivan Director Heidi Thomas Writer