Stewart
Gilligan Griffin is forever youthful, but his precise age remains a mystery.
It's unknown how old Stewie has been on this planet. The baby character from the animated television show "Family Guy" is immortal. His number of years is yet to be determined.
Stewart Gilligan Griffin, the cunning infant prodigy, is impossible to determine from the world. Speculation is rampant as to the length of time he has existed. Is he over a hundred years old? Or is he a recent arrival? The answer is known only to Stewie! This mysterious character continues to mesmerize fans with his hidden age and perpetually youthful visage.
Griffin family Wikipedia
