Yulia Volodymyrivna Tymoshenko (Ukrainian: Юлія Володимирівна Тимошенко, pronounced ), born Grigyan (Ukrainian: Грігян, from the Latvian surname "Grigan"); (born 27 November 1960) is a Ukrainian politician.
Tymoshenko was the Prime Minister of Ukraine from 24 January to 8 September 2005, and again from 18 December 2007 to 4 March 2010. She is the leader of the All-Ukrainian Union "Fatherland" party and the Yulia Tymoshenko Bloc.
She has been a practising economist and academic. Prior to her political career, Yulia Tymoshenko was a successful but controversial businesswoman in the gas industry, becoming by some estimates one of the richest people in the country. Before becoming Ukraine's first female Prime Minister in 2005, Tymoshenko co-led the Orange Revolution.