	He married Ulrika Fredrika Ekström and became the father of one son and five daughters, who married into the noble families af Ugglas, Biörnstierna, von Platen, d'Otrante and Rosenblad; he was the father of the composer Maria Fredrica von Stedingk. During the Seven Years' War, while Sweden was at war with Prussia, the 13-year-old Curt was an ensign in the personal regiment of the Crown Prince of Sweden.