Frank and Louie, sometimes referred to as Frankenlouie (September 8, 1999 – December 4, 2014), was a diprosopus (also known as “janus” or “two-faced”) cat known for his unusual longevity. He was named by the Guinness Book of World Records as the longest surviving janus cat in 2012.
Frank and Louie was born with one brain, but had two faces, two mouths, two noses and three blue eyes. He had only one functional mouth, however, with the other being born without a bottom jaw. He had one esophagus, connected to the mouth with both jaws. His middle eye was non-functional and did not blink, which made “Frank and Louie appear to be staring even when his other eyes are closed”.