Emperor Kuzco from "The Emperor's New Groove" was turned into a llama by his evil advisor Yzma, which is fitting seeing as the film takes place in Peru where llamas are plentiful.
Although Kuzco's llama form does share the characteristic long neck and snout with the actual animal, he doesn't look all that realistic. That may be because he spends most of the movie standing and sitting in very human-like manners.
Llamas are said to be gentle, shy, and friendly, which is a bit ironic seeing as Kuzco is known for being arrogant and ruthless. However, it is fitting that the protagonist learns how to be a better emperor, friend, and all-around person throughout his journey as a llama.