King Carl XVI Gustaf of Sweden is the reigning monarch of Sweden, having ascended to the throne in 1973. He is the only son of King Gustaf VI Adolf and Princess Sibylla of Saxe-Coburg and Gotha. He is the longest-serving monarch in
From Wikipedia
Carl XVI Gustaf is King of Sweden since 15 September 1973. Having reigned for 52 years, he is the longest-reigning monarch in Swedish history and the second longest-serving current head of state.