Maximilian, known by his sister Princess Theresa as Maxie, is the current King of Lichtenstein.
The youngest member of the Lichtenstein Royal Family, Maxie is still rather immature and loves to tell people how much he outranks them. He likes to play games and make up his own rules since he's "the king". When he cannot get his way, he threatens to cut peoples' heads off, which his sister Princess Theresa reminds him that he cannot do unless they commit treason. Arthur then tells him of an ingenious way to get around that rule.
Behind the Scenes
Maxie is played by actor Kieran Hodgson.
In reality, there is no King of Lichtenstein, as Lichtenstein is a Principality (ruled by a Prince).