History is full of child monarchs

According to Wikipedia, "A monarchy is a form of government in which supreme power is actually or nominally lodged in an individual, who is the head of state, often for life or until abdication, and "is wholly set apart from all other members of the state." The person who heads a monarchy is called a monarch".

Here we have Kenneth and Elise assuming supreme power jointly. The serfs, formerly known as parents, are left to look on in awe.

King Kenneth couldn't get enough of the throne and posed separately here.