Treebeard is a fictional character from J. R. R. Tolkien's universe, Middle-earth. Known as Fangorn in Sindarin, he is the oldest of the Ents, a tree-like being who is a sort of "shepherd of trees". Very tall and stiff-limbed, with bark-like skin and leafy hair, he befriends Meriadoc Brandybuck and Peregrin Took after they escape from Orcs. He leads a troop of Ents to destroy Saruman's tower, Orthanc.
Like most ents, Treebeard takes a long time to make up his mind. He repeatedly speaks of not "being hasty". But he makes a momentous decision about the orcs, Saruman and Orthanc after hearing the hobbits' report.
In the film, The Lord of the Rings: The Two Towers, Treebeard is a combination of a large animatronic model and a CGI construct; his voice is performed by John Rhys-Davies, who also plays Gimli.