When Rupert was attacked by an unfamiliar dog, Lois rescued and repaired him. In some of Stewie’s fantasies, Rupert has a human muscular body, with a teddy bear’s head. Stewie has a beloved teddy bear, called Rupert. He is voiced by Family Guy creator, Seth Macfarlane. Stewie has a unique head shape, which none of his family members have. Stewie is one year old and doesn’t have an official birthday. He lives with his family and dog Brian, on Spooner Street, in Quahog. He has a half-brother and enemy, Bertram. He has an older brother Chris and an older sister Meg. His parents are Peter, whom he calls ‘the Fat Man’, and Lois, who he refers to as her given name. His full name is Stewart Gilligan Griffin. If you’re a fan of Family Guy, check out these funny facts about the evil-genius, the baby of the family, Stewie Griffin.