Sydney Sweeney as Sister Cecilia

Álvaro Morte as Father Sal Tedeschi

Simona Tabasco as Sister Mary

Benedetta Porcaroli as Sister Gwen

Giorgio Colangeli as Cardinal Franco Merola

Dora Romano as Mother Superior

Giulia Heathfield Di Renzi as Sister Isabelle

Giampiero Judica as Doctor Gallo

Betti Pedrazzi as Sister Francesca

Giuseppe Lo Piccolo as Deacon Enzo

Cristina Chinaglia as Sister Friede

Niccolò Senni as Customs Official

Isabel Desantis as Young Cecilia

Viviane Florentine Nicolai as Sister Sally

Marisa Regina as Sister Joan

Laura Camassa as Young Novice

Cinzia Fantauzzi as Red Veiled Nun

Tiziano Ferracci as Weary Customs Official