Terry Klassen is a Canadian voice actor, ADR director and writer. Before animation, Klassen worked in radio in Winnipeg (CITI-FM), Toronto (Q107), Calgary (CFAC), Portage la Prairie (CFRY) and part-time at CFOX and CFMI. In animation, he is best known for his work on My Little Pony being voice director of all episodes including the movie and the Equestria Girls series. Klassen has also voiced many characters including Baby Sylvester in Baby Looney Tunes, Tusky Husky in Krypto the Superdog and Tony and Seth Parsons in The Cramp Twins.

Sylvester J. Pussycat Sr. is a fictional character, an anthropomorphic cat in the Looney Tunes and Merrie Melodies series of cartoons. Most of his appearances have him often chasing Tweety Bird, Speedy Gonzales, or Hippety Hopper. He appeared in 103 cartoons in the golden age of American animation, lagging only behind superstars Bugs Bunny, Porky Pig, and Daffy Duck. Three of his cartoons won Academy Awards, the most for any starring a Looney Tunes character: they are Tweetie Pie, Speedy Gonzales, and Birds Anonymous.