Stewie Griffin Wikipedia
Stewie is ageless, but his specific age remains a mystery. It's unclear the specific duration of time Stewie entered existing. The baby character from the animated television show "Family Guy" is immortal. His age is yet revealed.
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 over a hundred years old? Or is he fresh to the world? Only Stewie knows! This enigmatic character continues to mesmerize fans with his undisclosed age and youthful appearance.