Stewie is ageless, but his precise age remains a mystery. It's unknown how old Stewie became existing. The baby persona from the animated television show "Family Guy" is age-defying. His age is yet to be revealed.
Stewart Gilligan Griffin, the clever little troublemaker, is hiding his true age from the world. Speculation abounds as to the length of time he has existed. Is he a century old? Or is he a recent arrival? The truth lies only with Stewie! This mysterious character continues to captivate fans with his unrevealed age and perpetually youthful visage.
Saison 4 des Griffin Wikipédia