Betzy Holter was married to her fellow actor Karl Holter (1885–1963). However, they divorced in the mid-1930s and had had no contact with each other thereafter. Betzy Holter starred in the 1943 propaganda film "Unge viljer", but three of her children took an active part in the Norwegian resistance movement. Two of them (two daughters) later served in the Norwegian Navy in England from 1942 onward, after about a year in Stockholm. Holter's only son, Tord Holter, was wounded by the Germans in battle at Kongsvinger Fortress in April 1940, and he never fully recovered.