The character of Vin Miniver is absent and not referred to in this film because Greer Garson and Richard Ney married after the filming of Mrs. Miniver (1942), then divorced before she made this sequel. It was at her request Ney's character be dropped from this film in every way.
The Miniver Story (1950) also marked the film debut of British actor James Fox, who portrayed young "Toby Miniver" and was billed as 'William Fox' on this and several other films in the early 1950s.
H.C. Potter directed the film until late Jan 1950, when he was replaced by Victor Saville, who did not receive a screen credit. The substitution was made as part of M-G-M's compliance with British labor laws, which did not allow non-British subjects to work in Britain for more than 180 days.
In a crucial scene in a restaurant, a pianist is playing the song "Ol' Man River," from the Broadway musical "Show Boat." As "The Miniver Story" went into release, MGM, which filmed it, was preparing to begin filming their Technicolor remake of "Show Boat," which would be released in the summer of the following year (1951).