Ludo is the tritagonist of Jim Henson's Labyrinth. He is a giant but kind-hearted beast whom Sarah rescues from some of Jareth's goblins. He joins her in her quest to rescue her half-brother Toby. Despite his massive bulk he is a coward and very clever since he can summon rocks to help Sarah. Ludo was operated by Ron Mueck and Rob Mills, and was voiced by Ron Mueck.
Ludo looks monstrous, but has a gentle and playful nature, and is one of the few residents of the labyrinth who is not under Jareth's control. He speaks rudimentary broken English and refers to himself in the third person.
He also has the ability to summon rocks, from small stones to boulders capable of defeating an entire goblin army. This ability proved quite useful several times during the group's journey.
His name is likely derived from the board game, as a copy of it is stored on a bookshelf in Sarah's room.