Vitalii Volodymyrovych Klychko, known as Vitali Klitschko, is a Ukrainian politician and former professional boxer who has served as the mayor of Kyiv since 2014. He previously served as the head of the Kyiv City State Administration until the start of the Russian invasion of Ukraine in 2022. World heavyweight champion (WBC) from October 11, 2008 to December 15, 2013. Wiki link