(1951- ) Elio Di Rupo is a Belgian social-democratic politician and the Party Leader of the Socialist Party (PS). He is one of Belgium's most powerful politicians. Elio Di Rupo is a flamboyant left-winger, and is widely considered to have played a major part in the resurgence of the PS. He is widely known to always wear red bow ties. In May 2011, he was appointed Formateur by the Belgian king, which gave Di Rupo the task of forming a government. Traditionally, the Formateur will also become the Prime Minister of the government he formed. The 21 of November of 2011 Di Rupo presented his renounce to the King.