Family Guy Cast Ages Trivia Stewart Gilligan Griffin is ageless, but his precise age remains a mystery. It's unknown the exact number of
years Stewie has been existing. The toddler persona from the animated television show "Family Guy" is age-defying. His time on Earth is yet to be revealed.
Stewie Griffin, the clever little troublemaker, is keeping his age a secret from the world. Speculation is rampant as to how many years he has been alive. Is he a century old? Or is he a newcomer? Only Stewie knows! This enigmatic character continues to mesmerize fans with his undisclosed age and perpetually youthful visage.