Margaret Qualley Sister Cathleen Melissa Leo Reverend Mother Julianne Nicholson Nora Harris Dianna Agron Sister Mary Grace Morgan Saylor Sister Evelyn Maddie Hasson Sister Sissy Liana Liberato Sister Emily Rebecca Dayan Sister Emanuel Eline Powell Sister Candace Chelsea Lopez Sister Charlotte Denis O'Hare Archbishop Chris Zylka Chuck Harris Lisa Stewart Sister Genevieve Marco St. John Father Luca Danny Vinson Rob, Church Usher Neva Howell Sister Eleanor Peggy Walton-Walker Nun Teacher Ashley Bell Sister Margaret Marshall Chapman Sister Louisa Lacy Hartselle Sister Theresa (uncredited) Lucie Carroll Professed Nun (uncredited) Joseph Wilson Churchgoer (uncredited)