Who is the owner of the cat Sylvester?

Granny is the owner of the cat Sylvester. In the classic Looney Tunes setup, Sylvester lives with Granny and repeatedly tries to catch or eat her beloved pet canary, Tweety.

Granny was created by Friz Freleng and became firmly established in the 1950 cartoon short “Canary Row.” She is usually portrayed as a kind but protective elderly woman, while Sylvester is often her sometimes-pet whose predatory instincts cause trouble. Some stories also place Hector the Bulldog among her animal companions.

A common mix-up is to identify Tweety as Sylvester’s owner because Tweety is the character Sylvester chases most often. Tweety is instead Granny’s pet. Sylvester’s ownership can vary in individual cartoons, but Granny is the standard, canonical answer across the familiar Looney Tunes continuity.