Joseph Stalin, or Iosif Vissarionovich Stalin (Russian: Ио́сиф Виссарио́нович Ста́лин, pronounced [ˈjosʲɪf vʲɪsɐˈrʲonəvʲɪt͡ɕ ˈstalʲɪn]; born Ioseb Besarionis dze Jugashvili, Georgian: იოსებ ბესარიონის ძე ჯუღაშვილი, pronounced [iɔsɛb bɛsariɔnis d͡ze d͡ʒuɣaʃvili]; 18 December 1878 – 5 March 1953), was the de facto leader of the Soviet Union from the mid-1920s until his death in 1953.