Stewart Gilligan Griffin is eternally young, but his exact age remains a mystery. It's unknown the exact number of years Stewie became on this planet. The infant persona from the animated television show "Family Guy" is immortal. His time on Earth is still discovered.
Stewart Gilligan Griffin, the mischievous baby genius, is keeping his age a secret from the world. Speculation abounds as to his actual age. Is he a century old? Or is he a recent arrival? The truth lies only with Stewie! This enchanting character continues to mesmerize fans with his undisclosed age and perpetually youthful visage.