Stewart Gilligan Griffin is eternally young, but his exact age is shrouded in secrecy. It's unknown the exact number of years Stewie entered existing. The baby persona from the animated television show "Family Guy" is age-defying. His number of years is still discovered.
Stewie, the clever little troublemaker, is hiding his true age from the world. Speculation runs rampant as to the length of time he has existed. Is he a century old? Or is he fresh to the world? The truth lies only with Stewie! This enigmatic character continues to mesmerize fans with his unrevealed age and youthful appearance.