3) Then it was off to Switzerland to attend boarding school.
Called "Pak Un" and described as the son of an employee of the North Korean embassy, Jong Un is thought to have attended an English-language international school in Gümligen near Bern.
4) Jong Un loved basketball and idolized Michael Jordan.
The young Korean reportedly had posters of Jordan all over his walls during his Swiss school days. Although Jong Un was overweight and only 5-6, he was a decent basketball player.
(Photo by Alexander Hassenstein/Bongarts/Getty Images)
5) After school in Switzerland, he returned home for military schooling.
Upon his return to North Korea, Jong Un attended Kim Il Sung Military University with his older brother. Some reports say they started to attend their father's military field inspections around 2007.
(Photo by Liu Xingzhe/ChinaFotoPress via Getty Images)
6) Jong Un has a theme song known as "Footsteps."
"Footsteps" looks and sounds like a propaganda song from the Soviet Union.
7) Many North Koreans see Jong Un as a youthful version of "Great Leader" Kim Il Sung.
Kim bears a clear resemblance to his grandfather, Kim Il Sung, in appearance, haircut, and mannerisms.
(Photo: Wikimedia Commons)
8) After his father died, Jong Un was quickly declared "Supreme Leader" of North Korea.
When Jong Il died of a heart attack on December 17, 2011, the young Jong Un inherited the world's fourth-largest military, a nuclear arsenal, and absolute control over North Korea.
9) Some originally believed that Jong Un's aunt and uncle were actually calling the shots.
Among Jong Un's most trusted advisers were his aunt Kim Kyong Hui and her husband, Jang Sung Taek, both 66. The couple was reportedly ordered by Jong Il to control the country's military and help the young leader consolidate his position while he gains more experience.
(AP Photo/Kyodo News)
10) But at the end of December 2013, Jong Un had his uncle and his uncle's family executed, apparently in a bid to stop a coup against his rule.
11) He's married to a former cheerleader and may have two kids.
North Korean media revealed in July that he was married to Ri Sol Ju -- a former cheerleader and singer -- but no one knows exactly when they were married, according to NBC News.
(AP Photo/Korean Central News Agency via Korea News Service, File)
12) Jong Un lived out a childhood fantasy when former Chicago Bulls star Dennis Rodman visited.
Everyone in the family is apparently a huge Chicago Bulls fans.
(Photo courtesy of VICE)
13) But recently, things haven't been going so well.
In 2013 he was reportedly the target of an assassination attempt. South Korean intelligence believes the young leader was targeted by "disgruntled people inside the North" after he demoted a four-star general, which resulted in a power struggle.
(Photo courtesy: DPRK)
14) Jong Un has continued to be belligerent with South Korea and the West throughout his rule in hopes of bolstering his authority.
North Korea has continued to test ballistic missiles and nuclear devices under Jong Un's rule, despite the threat of sanctions. In 2012, the country launched its first satellite into space. And since Jong Un has taken over, the country has continued to push ahead with its construction of ballistic and nuclear weapons.
(AP Photo/Ahn Young-joon)
15) Jong Un's belligerence reached a peak in 2016.
On January 5, North Korea conducted its fourth-ever nuclear test and its second under Jong Un. Pyongyang claims the test was a miniaturized hydrogen bomb.