Stewart Gilligan Griffin is timeless, but his exact age remains a mystery. It's unknown the specific duration of time Stewie became living. The baby character from the animated television show "Family Guy" is immortal. His age is still determined.
Stewart Gilligan Griffin, 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 fresh to the world? The truth lies only with Stewie!
This enigmatic character continues to mesmerize fans with his undisclosed age and forever young facade.
List of Family Guy cast members Wikipedia