Kim Il Sung, the former leader of the Democratic People's Republic of Korea, as a 16-year-old in 1928. He joined a communist youth organization around that time and was arrested and jailed for activities with the group.
In this June 21, 1980, file photo, Canadian Prime Minister Pierre Trudeau kneels at St. Mark's Square in Venice, Italy, with his 8-year-old son Justin as they feed pigeons at the famous square. On Monday, Oct. 19, 2015, Canadian voters reclaimed their country's liberal identity sending Justin Trudeau to the prime minister's office and ending 10 years of conservative leadership under Stephen Harper. At 43, he becomes the second youngest prime minister in Canadian history.
(AP Photo/Massimo Sambucetti, File)
Joseph Stalin, who later became the leader of the USSR, in 1902, a few years after he dropped out from seminary school.
Future Italian Prime Minister Matteo Renzi appeared on Italy's Ruota della Fortuna (Wheel of Fortune) in the early 1990s at age 19. He won the equivalent of tens of thousands of euros.
The caption describing Fidel Castro in his 1945 high school yearbook reads: "Distinguished student and a fine athlete. Very popular. Will study law and we have no doubt he will have a brilliant future."
Japanese Prime Minister Shinzo Abe as a child, left, with his family in 1956. His father, Shintaro Abe, was foreign minister between 1982 and 1986.
Aung San Suu Kyi, state counsellor of Myanmar, as a 6-year-old in 1951. She was awarded the Nobel Peace Prize in 1991 but has since been criticized by rights groups over her failure to speak up for minority groups.
Queen Elizabeth II, right, practices bandaging with her sister, Margaret, who both joined the 1st Buckingham Palace Company of Girl Guides, in 1943. The two stripes on her uniform indicate that she's patrol leader.
Pope Francis — back when he was still Jorge Mario Bergoglio — as a student, circa 1948-49.