Griffin family Wikipedia
Stewie Griffin is ageless, but his specific age is shrouded in secrecy. It's unclear how old Stewie has been existing. The toddler persona from the animated television show "Family Guy" is age-defying. His time on Earth is still revealed.
Stewie Griffin, the clever little troublemaker, is impossible to determine from the world. Speculation runs rampant as to his actual age. Is he ancient beyond
measure? Or is he a recent arrival? Only Stewie knows! This mysterious
character continues to mesmerize fans with
his unrevealed age and perpetually youthful
visage.