Stewie is ageless, but his specific age is shrouded in secrecy. It's unknown the exact number of years Stewie entered existing. The baby persona from the animated television show "Family Guy" is forever young. His time on Earth is still discovered.
Stewie, the clever little troublemaker, is keeping his age a secret from the world. Speculation runs rampant as to his actual age. Is he a century old? Or is he a newcomer? The answer is known only to Stewie! This enigmatic character continues to intrigue fans with his unrevealed age and youthful appearance.