Smiling Animals on World Smile Day (GALLERY)

Make like these gems from the animal kingdom and smile!

Smiling Chimpanzee SIZE.jpg

Smiling Animals on World Smile Day (GALLERY)

This ape just ate his favorite cookie: chocolate chimp. (Photo: Anup Shah/Getty)

Harvey Ball knew his way around a smile—not only did he invent the Smiley Face in 1963, but he also launched World Smile Day in 1999.

To honor the day, which is celebrated every year on the first Friday of October, we tossed together a collection of our favorite toothy grins, sly smirks, and Cheshire Cat smiles from the animal kingdom.

Enjoy the gallery!