Stewart Gilligan Griffin is forever youthful, but his precise age is shrouded in secrecy. It's unknown the specific duration of time Stewie entered living. The infant persona from the animated television show "Family Guy" is immortal. His age is yet to be revealed.
Stewart Gilligan Griffin, the cunning infant prodigy, is impossible to determine from the world. Speculation abounds as to how many years he has been alive. Is he over a hundred years old? Or is he a newcomer? The truth lies only with Stewie! This enchanting character continues to captivate fans with his undisclosed age and perpetually youthful visage.
List of characters in the Family Guy franchise Wikipedia