 At the 2015 Copa América, Willian assisted Roberto Firmino's decisive goal in the 2–1 win over Venezuela in Santiago, a result which sent Brazil into the quarter-finals as group winners.On 5 May 2016, he was named by Brazil manager Dunga among the 23-man list for the Copa América Centenario to be held in the United States.In May 2018 he was named in Tite’s final 23-man squad for the 2018 FIFA World Cup in Russia.