Illumination Entertainment announced today that it will create a 3D animated movie based on Ricky Gervais’ “Flanimals” children’s book series. The four-volume book series tells the story of 50 ugly creatures who turn out to be quite cute. Gervais will play a chubby purple creature who’s on a mission to change the world.

Gervais will serve as executive producer and will also voice the lead character. The script will be written by Matt Selman, whose credits include The Simpsons Movie.