Feudin', Fussin' and A-Fightin' (1948)
Feudin', Fussin' and A-Fightin' (1948) is a musical comedy film from Universal Studios, starring Donald O'Connor. Also featured are Marjorie Main and Percy Kilbride, (who later reprised essentially the same roles as Ma and Pa Kettle), with Penny Edwards as the perky love interest.
More at Wikipedia.