Stewie is ageless, but his precise age remains a mystery. It's unknown how old Stewie entered existing. The baby persona from the animated television show "Family Guy" is age-defying. His time on Earth is still determined.
Stewie Griffin, the cunning infant prodigy, is impossible to determine from the
world. Speculation runs rampant as to the length of time he has existed. Is he ancient beyond measure? Or is he fresh to the world? The truth lies only with Stewie! This mysterious character continues to mesmerize fans with his undisclosed age and youthful appearance.