Iguanodon was one of the first dinosaurs ever to be discovered. It lived in the early Cretaceous period, about 110–140 million years ago. Growing to a length of 30 feet and a height of 9 feet tall on all fours, but on their hind legs, they can stand 16 feet tall. Iguanodon could move on all fours, or just on its hind legs. The "hands" of the Iguanadon made this ornithopod different from most other dinosaurs. Each hand had five "fingers". Three fingers in the middle had hoof-like claws, which were useful when walking. Another finger could be pulled in toward the palm and was used to grasp with. A fifth finger was a sharp, spiked thumb used for defense. This particular Iguanodon is showcased in the Walt Disney feature film Dinosaur.
Iguanodons were seen many times in this film. The protagonist, Aladar, was an Iguanodon. Members of the herd, including its leader Kron, his sister Neera, and his lieutenant Bruton were also Iguanodons.
In the film, the Iguanodons were portrayed with lips instead of a beak, because the producers found that this was easier to animate.