The film version was written by
Robert Presnell Jr., who set the story in 1943. Presnell was reportedly a front for
Dalton Trumbo. The script was optioned by
Albert C. Gannaway in 1958, but he could not get financing to make the picture. Betty Box became enthusiastic about the movie and wanted to make it. She took it to the Rank Organisation. Box says Rank did not want them to make the movie but allowed her because of the success of the
Doctor in the House series. "They said, 'It's religion, it's nuns, it's wartime, who wants to know? Tell you what, make us another
Doctor and you can do it!" Box and Thomas made
Doctor in Love (1960) as a pay off for Rank financing the movie.
Filminkk pointed out "all those female stars Rank had misused over the years (
Kay Kendall,
Diana Dors,
Maureen Swanson, etc) must have looked on in bewilderment as
Conspiracy of Hearts starred two actresses not even under contract to the studio, Sylvia Syms and Lili Palmer (both, it must be said, are excellent)." The film was shot on location in Italy and at Pinewood Studios in London. Some filming took place at La Certosa di Galluzzo monastery near Florence. Ronald Lewis had been under contract to the Rank Organisation but dropped in 1958 - however the studio hired him again for this film. ==Reception==