Vassilis "Billy" Spanoulis (; born August 7, 1982) is a Greek professional basketball player for Olympiacos of the EuroLeague. A tall combo guard, he is nicknamed Kill Bill, V-Span, and MVP ("Most Vassilis Player"). Spanoulis was named the Balkan Athlete of the Year in 2009, the All-Europe Player of the Year in 2012 and 2013, the Vatican's World Athlete of the Year (Giuseppe Sciacca Award) in 2013 and the EuroLeague MVP the same year. He has earned a record eight All-EuroLeague Team selections. He was also voted the EuroLeague's 2010–2020 Player of the Decade. He is also the EuroLeague's all-time career leader in total points scored.