Tweety Bird (also known as Tweety Pie or simply Tweety) is a fictional Yellow Canary in the Warner Bros. Looney Tunes and Merrie Melodies series of animated cartoons. The name "Tweety" is a play on words, as it originally meant "sweetie", along with "tweet" being a typical English onomatopoeia for the sounds of birds. His characteristics are based on Red Skelton's famous "Mean Widdle Kid."
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.