"The Screen Guild Theater" broadcast a 30 minute radio adaptation of the movie on April 5, 1943 with Margaret O'Brien and Robert Young reprising their film roles.
Although William L. White's book is listed on-screen as the source of the movie, accounts of his adoption had previously been published in Reader's Digest and Life Magazine.
The final film of veteran director W.S. Van Dyke. He was dying of cancer while shooting it, and committed suicide not long after its release.
This is the film from which Margaret O'Brien took her name. She was born Angela O'Brien, but she so identified with the character she played in this film that she decided to change her name to Margaret.