- Based on the real-life Gilbreth family. Daughter Mary died from a childhood illness; the movie includes a Mary but keeps her somewhat in the background with no lines.
- The big house the family moves to in Montclair is the same house set originally built for 'Judy Garland' 's family in Meet Me in St. Louis (1944). Fox didn't have an appropriate standing outdoor set so they rented time on the "St. Louis Street" on MGM lot #2.
- In the movie, the last child born is a boy named "Robert". But in real life, the last Golbreth child was a girl named "Jane". There was a son named Robert, but he was the second-to-last child born.
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