The patriarch and matriarch of the Hubbard family, Marcus and Lavinia, are played by real-life husband and wife
Fredric March and
Florence Eldridge who had previously teamed onscreen in
The Studio Murder Mystery (1929),
Les Misérables (1935) and
Mary of Scotland (1936), the last-named being Eldridge's most recent screen credit prior to ''Another Part of the Forest''. Subsequently Eldridge and March would re-team in
An Act of Murder (1948) (also starring
Edmond O'Brien),
Christopher Columbus (1949), and - again as married Southerners -
Inherit the Wind (1960), these three films comprising Eldridge's entire cinematic career subsequent to ''Another Part of the Forest''.