Early Life: It is unknown when Kim Jong-un was born, although North Korea's official position is that his birthday is on January 8th of 1982. Many have pointed out that this birthday seems a little too "perfect" to be true, as that would mean he was born exactly 70 years after his grandfather and exactly 40 years after his father. His father was Kim Jong-il, who was the previous leader of North Korea. Kim Jong-un's grandfather was Kim Il-sung, the man who first established the People's Democratic Republic of Korea, which today is mainly referred to as North Korea.