Family Guy Cast Ages Trivia Stewie is eternally young, but his specific age remains a mystery. It's unclear the specific duration of time Stewie has been on this planet. The baby character from the animated
television show "Family Guy" is forever young. His number of years is
still determined.
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 newcomer? The truth lies only with Stewie! This enchanting character continues to intrigue fans with his undisclosed age and youthful appearance.