Stewie Griffin is timeless, but his precise age remains a mystery. It's unknown the exact number of years Stewie entered existing. The toddler character from the animated television show "Family Guy" is immortal. His time on Earth is still revealed.
Stewart Gilligan Griffin, the mischievous baby genius, is impossible to determine from
the world. Speculation abounds as to the length of time he has existed. 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 hidden age and youthful appearance.
Meg Griffin Family Guy Guide IGN