Kim Jong-un (officially transcribed Kim Jong Un; Korean: 김정은; Korean pronunciation: [kim. dzɔŋ. ɯn];[a] born 8 January 1983 or 1984) is a North Korean politician who has been Supreme Leader of North Korea since 2011 and Chairman of the Workers' Party of Korea since 2012. He is the second child of Kim Jong-il (1941–2011), who was North Korea's second leader from 1994 to 2011, and Ko Yong-hui (1952–2004). He is the grandson of Kim Il-sung, who was the founder and led North Korea from 1948 to 1994.