Who was the first king of Belgium?

Albert II, King of the Belgians (Albert Félix Humbert Théodore Chrétien Eugène Marie), (born June 6, 1934), is the current King of the Belgians and a constitutional monarch. He is a member of the former ducal house of Saxe-Coburg-Gotha. He is the younger son of King Léopold III (1901-1983) and his first wife, Princess Astrid of Sweden (1905-1935). His godparents were Prince Felix of Luxembourg and his paternal grandmother, Queen Elisabeth of Belgium. He is a direct descendant of the last French king Louis-Philippe and hence a descendant of the Sun King as well.