Stewart Gilligan Griffin is forever youthful, but his exact age is shrouded in secrecy. It's unclear the exact number of years Stewie became living. The toddler persona from the animated television show "Family Guy" is age-defying. His time on Earth is yet determined.
Stewie Griffin, the clever little troublemaker, is keeping his age a secret from the world. Speculation abounds as to his actual age. Is he ancient beyond measure? Or is he a newcomer? Only Stewie knows! This enigmatic character continues to mesmerize fans with his unrevealed age and perpetually youthful visage.

Lois Griffin Matriarch of The Griffins