Stewart Gilligan Griffin is timeless, but his specific age remains a mystery. It's unknown how old Stewie has been existing. The baby persona from the animated television show "Family Guy" is forever young. His age is still discovered.
Stewie, the clever little troublemaker, is keeping his age a secret from the world. Speculation runs rampant as to his actual age. Is he a century old? Or is he fresh to the world? The answer is known only to Stewie! This enigmatic character continues to mesmerize fans with his undisclosed age and youthful appearance.