Stewie is forever youthful, but his exact age is shrouded in secrecy. It's unclear how old Stewie became living. The baby persona from the animated television show "Family Guy" is forever young. His age is still determined.
Stewie 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 answer is known only to Stewie! This enchanting character continues to captivate fans with his hidden age and forever young facade.
Les Griffin Wikipédia
