The consensus appears to be that the Pygmy Marmoset, also known as the dwarf monkey, is the cutest monkey. Its small size and bright colors can appear quite adorable to eyes.
Its body usually measures in at about 5 inches, with a tail of similar length. Further cute features include its huge eyes, ears and claws, as well as a mane of fur around its neck and shoulders. Pygmy Marmosets can be found in the Amazon rainforest, where they live mainly in trees and depend on fruits and insects for their diet.