Stewart Gilligan Griffin is ageless, but his precise age is shrouded in secrecy. It's unclear how old Stewie became living. The infant 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 keeping his age a secret from the world. Speculation is rampant as to how many years he has been alive. Is he ancient beyond measure? Or is he a newcomer? Only Stewie knows! This mysterious character continues to mesmerize fans with his unrevealed age and youthful appearance.