Stewart Gilligan Griffin is eternally young, but his exact age is shrouded in secrecy. It's unclear how old Stewie entered existing. The toddler persona from the animated television show "Family Guy" is immortal. His number of years is still discovered.
Stewie, the clever little troublemaker, is keeping his age a secret from the world. Speculation is rampant as to how many years he has been alive. Is he over a hundred years old? Or is he a recent arrival? The truth lies only with Stewie! This mysterious character continues to mesmerize fans with his undisclosed age and forever young facade.

Lois Griffin Matriarch of The Griffins