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4 Answers
- Anonymous1 decade agoFavourite answer
- LLv 71 decade ago
1 year old.
Stewart "Stewie" Gilligan Griffin is the flamboyant and eccentric one year old infant of Peter and Lois Griffin.
http://familyguy.wikia.com/wiki/Stewie_Griffin
Stewie is a 1-year-old who has a very sophisticated psyche. He reached his first birthday in the season 1 episode "Chitty Chitty Death Bang", and has remained the same age ever since.
- Anonymous1 decade ago
Stewie is a 1-year-old who has a very sophisticated psyche.[6] He reached his first birthday in the season 1 episode "Chitty Chitty Death Bang", and has remained the same age ever since.
Source(s): http://en.wikipedia.org/wiki/Stewie_Griffin - 1 decade ago
Ummm he still wears diapers so i think he is like 2 years old HAHAHAHAAH
Source(s): i love family guy