Monarchs of the world who were crowned before they turned 20

In October 2017, Jacinda Ardern, prime minister of New Zealand, registered her name in the list of youngest world leaders to rule a country.

Along with Jacinda Ardern, there are several Young Turks leading the countries at an early in their life like France president Emmanuel Macron (40) and North Korean leader Kim Jong-Un who is according to North Korean record is 36 years old. (There is a conflict in Kim Jong Un's age. South Korean record says he is 35 and according to American records he is 34)

Let's take a look at the youngest Monarchs who were crowned at a very young age.

Surrounded with several legends around birth and childhood, Alexander III was king of the ancient Greek kingdom of Macedon.

He succeeded his father and became a king when he was 20-year-old and created one of the largest empires in the ancient world by the age of thirty, stretching from Greece to northwestern India.

The youngest British monarch, Mary, Queen of Scots, was just 6-day-old when she was crowned as queen in 1542.

She reigned over Scotland from 1542 to 1567 and became queen after her father died of either drinking contaminated water or effects of a nervous collapse following the battle of Solway Moss.

Henry VI, was only 8 months and 26 days old at the time of his accession.

King of England Henry VI ruled over England twice (from 1422 to 1461 and second time in 1470 to 1471) and succeeded to the throne at the age of nine months upon his father's demise.

Though there is no confirmation whether he was 11 or 12 when the last ruler of Egypt's Ptolemaic dynasty came to power.

Theos has been credited with changing the history of Egypt when he masterminded a civil war after he felt he was being overshadowed by his famous sister who later went on to become his wife, Cleopatra.

Later, he in cahoots with an influential member of the court expelled Cleopatra from Egypt to Syria.

Alfonso XIII could be considered as the youngest ever king to be crowned as he became a king the day he was born on May 17, 1886. Though his mother Maria Christina of Austria had the power as his regent until he assumed full powers on his sixteenth birthday in 1902.

Alfonso has never been considered a great leader as his ignorance of politics led to political instability and caused his own country's defeat by intervening in 1921 Moroccan war.

China's last emperor Pu Yi was also one of youngest monarchs to be crowned. However, his reign came to an end within a short span of time.

Pu Yi was crowned at the age of two but after the eruption of revolution in China, the entire dynasty crumbled.

Born as Abu'l-Fath Jalal-ud-din Muhammad Akbar and popularly known as just Akbar, reigned from 1556 to 1605. Akbar reigned when he was just 13 year--old succeeding his father Humayun.

He was a great emperor who expanded and consolidated Mughal domains in India. He established a centralised system of administration throughout his empire and adopted a policy of conciliating conquered rulers though marriage and diplomacy.

Baldwin came to power when he was 13. He is one of the most important rulers of Jerusalem who saved Jerusalem from being annexed at the age of just 16 and ruled until his death.

He repeatedly defended his Cristian kingdom against Saladin, Sultan of Egypt and Syria.