Stewie Griffin is forever youthful, but his specific age is shrouded in secrecy. It's unknown the specific duration of time Stewie has been existing. The baby character from the animated television show "Family Guy" is age-defying. His age is yet revealed.
Stewart Gilligan Griffin, the mischievous baby genius, is keeping his age a secret from the world. Speculation is rampant as to the length of time he has existed. Is he a century old? Or is he a recent arrival? The answer is known only to Stewie! This mysterious character continues to mesmerize fans with his unrevealed age and youthful appearance.