The forum has previously invited famous speakers at the event such as George H.W. Bush , John Major, Bill Clinton, Gerhard Schroeder – the former German chancellor, Madeleine Albright, Prince Al-Waleed Bin Talal, Queen Rania of Jordan, Recep Tayyip Erdogan – Prime Minister of Turkey, Rafik Hariri, Mahathir Mohamad – Prime Minister of Malaysia, and Lubna Olayan, Hillary Rodham Clinton, Klaus Schwab, Hayyat Sindi and Princess Victoria Ingrid. __