King Julien XIII is a supporting character and occasional antagonist in the Madagascar franchise, a minor character in Penguins of Madagascar: The Movie, the anti-heroic deuteragonist of The Penguins of Madagascar, and the titular anti-heroic main protagonist of All Hail King Julien and All Hail King Julien: Exiled. He is Maurice's best friend.
He is voiced by Sacha Baron Cohen in the films (excluding the spin off movie Penguins of Madagascar where Jacobs reprised his role, albeit a cameo during a mid credits scene), Danny Jacobs in the video games, TV shows and the specials, and Keith Ferguson in the first video game.