Kim Jong-un was 28 years old when he came into power. He was declared the supreme leader of the Democratic People's Republic of Korea, also known as North Korea, on Dec. 28, 2011 following his father's state funeral.
Kim Jong-un was born on Jan. 8, 1983. He is the youngest son of former leader Kim Jong-il. Reports from Japanese media claim that Kim Jong-un went to school abroad in Switzerland from 1993 to 1998. There has been no official biography of Kim Jong-un's life as of 2014. Information on his early life has come from people who claim to have been his classmates and defectors from North Korea.