 The movie featured a rare onscreen performance by  Marni Nixon (qv), who plays Sister Sophia. The producers werent  sure how Julie Andrews (I) (qv) would react to her after Nixon  dubbed Audrey Hepburn (qv) in a role made famous by Andrews, but  when Andrews first met Nixon, she exclaimed, "Marni, Im a fan of  you!" and the producers were relieved.