Sylvester J. Pussycat, Sr., Sylvester the Cat or simply Sylvester, or Puddy Tat, is a fictional character, a three-time Academy Award-winning anthropomorphic Tuxedo cat in the Looney Tunes and Merrie Melodies repertory, often chasing Tweety Bird, Speedy Gonzales, or Hippety Hopper. The name "Sylvester" is a play on Felis silvestris, the scientific name for the wild cat species (domestic cats like Sylvester, though, are actually Felis catus).
The character debuted in Friz Freleng's Life With Feathers (1945). Freleng's 1947 cartoon Tweetie Pie was the first pairing of Tweety with Sylvester, and the Bob Clampett-directed Kitty Kornered (1946) was Sylvester's first pairing with Porky Pig. Sylvester appeared in 103 cartoons in the golden age, three of which won Academy Awards, the most for any Looney Tunes character.