- Matt Mattox' singing was dubbed by Bill Lee (I).
- Every scene was shot twice to accommodate some theatres which couldn't show the widescreen version.
- Only four of the brothers were dancers. Russ Tamblyn (Gideon) was an acrobat, and Jeff Richards (Benjamin) was an actor. Benjamin rarely dances in the movie.
- Jacques d'Amboise had to leave before filming was finished, so someone filled in for him during the last few days. You can see someone else playing Ephraim in the scene where the brothers are pacing downstairs while Milly is giving birth.
- For the brides costumes, designer Walter Plunkett went to the Salvation Army, found old quilts and turned them into dresses.
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