Swedish Carl Gustaf Folke Hubertus born April 30, 1946, Stockholm, Swed. King of Sweden from 1973. Grandson of King Gustav VI Adolf (1882-1973), he became crown prince in 1950, his father having died in 1947. After studying at military schools, he became a naval officer. His accession occurred at a time when the role of the Swedish monarchy was being radically altered; the new constitutional laws of 1973 left the king with a solely symbolic function rather than a formal role in the country's administration