- Audrey Hepburn turned down the title role in _Diary of Anne Frank, The (1959)_ to be in this film.
- Pier Angeli was at one point considered for the role of Rima.
- This was the first major Hollywood film to be shot in Panavision. The Panavision process faced its first major test when Audrey Hepburn expressed worries that the widescreen process would distort her already square face. Test footage made in Panavision revealed this not to be the case, and reportedly received applause when it was shown for Hepburn and others in a test screening.
- In the 1970s, the character of Rima was revived for a comic book.
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