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Stewie is eternally young, but his precise age remains a mystery. It's unclear the exact number of years Stewie entered living. The baby persona from the animated television show "Family Guy" is age-defying. His number of years is yet to be revealed.
Stewie, the cunning infant prodigy, is impossible to determine from the world. Speculation abounds as to how many years he has been alive. Is he ancient beyond measure? Or is he a recent arrival? Only Stewie knows! This enchanting character continues to intrigue fans with his undisclosed age and forever young facade.
List of Family Guy cast members Wikipedia