Henry Koster Director Debbie Reynolds Sister Ann Actor Ricardo Montalban Father Clementi Actor Greer Garson Mother Prioress Actor Agnes Moorehead Sister Cluny Actor Chad Everett Robert Gerarde Actor Katharine Ross Nicole Arlien Actor Juanita Moore Sister Mary Actor Ricky Cordell Dominic Arlien Actor Michael Pate Mr. Arlien Actor Tom Drake Fitzpatrick Actor Larry D. Mann Mr. Duvries Actor Charles Robinson Marauder Actor Monique Montaigne Sister Michele Actor Ed Sullivan Self John Beck Producer Hayes Goetz Producer Sally Benson Screenwriter John Furia Screenwriter Milton R. Krasner Cinematographer Rita Roland Film Editing George W. Davis Art Director Urie McCleary Art Director Henry Grace Set Decoration Jerry Wunderlich Set Decoration