The King of Hearts is the consort of the Queen of Hearts, and, unlike most instances, is generally the lesser of the two monarchs. He is much smaller than his wife, as well as meeker. While he tries to please his wife, at the same time, he is one of the few people who is able to change her mind about anything, such as altering Alice's beheading to a trial instead. He seems to act more like a son to his wife than a husband, as he asks her to put Alice on trial in a childlike manner, and she pats him on the head like he were a child after taking his suggestion for the trial, as well as using him as a shield against an oversized Alice. Unfortunately, he is only created in Alice's dreams, and vanishes from her mind once she awakens.
The King of Hearts appears in the later portions of the film, alongside his wife; he notably receives much less of a welcome from his subjects (particularly the White Rabbit) than the Queen. He initially assumes that Alice is a card, but is quickly corrected. When Alice later angers the Queen, he surprisingly convinces the Queen to give Alice a trial rather than an immediate beheading. He functions as the head of the court, later citing regulation when Alice grows to extreme heights after eating mushroom pieces. The King is later seen in the big chase scene near the end of the film.
The King of Hearts appeared several times alongside the Queen and other Wonderland characters in the audience of the House of Mouse.
The King of Hearts made appearances as a walk-around character in the early days of the theme park but was eventually retired from most parks.
The King returned as a walkaround character in the Tokyo Disneyland parade Happiness is Here & Dreaming Up!. He and the Queen are also heavily featured in the dining area, the Queen of Hearts Banquet.
The King's likeness is featured in the Alice's Curious Labyrinth attraction.