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Stewart Gilligan Griffin is forever youthful, but his specific age remains a mystery. It's unclear the specific duration of time Stewie has been living. The baby character from the animated television show "Family Guy" is immortal. His number of years is yet revealed.
Stewie Griffin, the mischievous baby genius, is keeping his age a secret from the world. Speculation is rampant as to his actual age. Is he a century old? Or is he a recent arrival? Only Stewie knows! This enigmatic character continues to mesmerize fans with his hidden age and youthful appearance.
Meg Griffin Family Guy Guide IGN