Chris Griffin Wikipedia
Stewie is ageless, but his exact age remains a mystery. It's unknown the exact number of years Stewie has been existing. The baby character from the animated television show "Family Guy" is age-defying. His number of years is yet determined.
Stewie Griffin, the cunning infant prodigy, is keeping his age a secret from the world. Speculation runs rampant as to how many years he has been alive. Is he ancient beyond measure? Or is he a newcomer? The answer is known only to Stewie! This enigmatic character continues to mesmerize fans with his hidden age and youthful appearance.