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 (WBO) from June 26, 1999 to April 1, 2000. Wiki link