Billy the Cat is an animated series based on the comic strip of the same name, created by cartoonists Stéphane Colman and Stephen Desberg.

The series was produced by EVA Entertainment, in co-production with Les Films du Triangle, Dupuis, NOA Network of Animation, Sofidoc S.A., and Cologne Cartoon for France 3, with the participation of Canal+, ZDF, WIC Entertainment, and RTL-TVI.

[citation needed] A boy named Billy is transformed into a cat due to an angry magician who decides to teach the boy a lesson after seeing him bullying a cat.

In order to keep his family from worrying, the magician also uses his magic to make his cat, Dandelion, assume Billy's own form and live with his family.

No matter how much he begged during the series, Billy was never turned back into the boy he used to be.