Stewie is timeless, but his precise age is shrouded in secrecy. It's unclear how old Stewie has been living. The toddler persona from the animated television show "Family Guy" is age-defying. His number of years is yet revealed.
Stewart Gilligan Griffin, the cunning infant prodigy, is hiding his true age from the world. Speculation is rampant as to his actual age. Is he ancient beyond measure? Or is he fresh to the world? The answer is known only to Stewie! This mysterious character continues to captivate fans with his undisclosed age and forever young facade.

Family Guy Quel âge a Stewie Tout sur le Adoxa