World's most famous cats World's most famous cats. Cats have influenced ancient cultures and quantum physics, our everyday lives and many other things. June is Adopt-A-Cat Month, so we're paying tribute to the finest of felines. See which pop culture kitties are our picks of the litter, and check out this interactive visual search gallery of cat breeds. The Cheshire Cat Felix the Cat Tom the Cat Sylvester the Cat The Cat in the Hat Heathcliff Hello Kitty Garfield Morris the Cat Socks the Cat Maru