He is voiced by series creator Seth MacFarlane and first appeared on television, along with the rest of the Griffin family, in the episode "Death Has a Shadow" on January 31, 1999.

He has also come to have a very close friendship with the family's anthropomorphic dog, Brian, whom he originally used to antagonize in the earliest episodes.

Stewie is considered to be the show's breakout character and has received numerous award nominations from writers such as Jodiss Pierre.

[2] Stewie Griffin is portrayed as a one-year-old prodigy who has a sophisticated voice, football head, and can speak very fluently in an upper-class British accent with quite-advanced vocabulary.

Very highly literate and able to cite pop culture references that long predate his birth, Stewie is also entranced by Raffi and Teletubbies.

Stewie succumbs to other childish tendencies; he believes Peter has truly disappeared in a game of peekaboo, often has difficulties understanding the concept of shapes, talks to his teddy bear Rupert as if he were alive, is overcome with laughter when Lois blows on his stomach;[4] and has no idea how to use a toilet.

In "The Big Bang Theory" it is revealed that he is descended from Italian polymath Leonardo da Vinci, on Lois's side of the family.

Stewie employs these to cope with the perceived stresses of infant life (such as teething pain and eating broccoli)[6] and to murder his mother, Lois, with mixed success at best depending on the objective.

As made clear in the pilot episode, Stewie's matricidal tendencies are a result of Lois constantly and unwittingly thwarting his schemes, and so he desires to kill her to carry out his plans without her interference.

In other, later episodes, Stewie engages in other violent and criminal acts, including robbery, aggravated assault, carjacking,[7] loan sharking,[8] forgery,[9] and killing off many minor characters (with a tank, guns, and other assorted weaponry).

Because of the rather disastrous ending for himself in the simulation, being shot and killed by Peter, he decides to put aside his outlandish plans of matricide and world domination for the time being.

This extends to the point of his ability to keep pigs from parallel universes ("Road to the Multiverse") or take part in the television series Jolly Farm ("Go Stewie Go"), as compared to the first season, in which his plans were constantly hindered by Lois.

Stewie is shown in more recent episodes to be a superfan of Taylor Swift and even sets her up with Chris as a prom date.

Stewie intensely dislikes him and is one of the few characters fully aware of Herbert's nature, even calling him a pervert to his face.

Another is where he has a picture of Chris Noth in his wallet and he expresses his wishes to have sexual relations with Brian's son, Dylan.

Characters evolve in certain ways and we found that doing the take-over-the-world thing every week was getting played out and was starting to feel a little dated.

It also explains why he's so hellbent on killing his mother, Lois, and taking over the world: he has a lot of aggression, which comes from confusion and uncertainty about his orientation.

[31] Several commentators have noticed similarities between Stewie and the title character of the graphic novel Jimmy Corrigan, the Smartest Kid on Earth (first published in 1995), including its author, Chris Ware.

"[33] Stewie has been included on Family Guy T-shirts, baseball caps, bumper stickers, cardboard standups, refrigerator magnets, posters, and several other items.

Desperate to stop him, Stewie shrinks and makes his way to Bertram's lair within Peter's testicles to discover his plan, destroy his henchman cloning lab, and rescue a kidnapped Rupert from a rocket.

Stewie appeared in the Bones season 4 episode "The Critic in the Cabernet",[37] as the result of a brain tumor-induced hallucination that FBI Special Agent Seeley Booth (David Boreanaz) was suffering from.

[40][41] He appeared on the December 21, 2009, episode of Late Show with David Letterman to present "Top Ten Things You Don't Want To Hear From Your Child."

In "E. Peterbus Unum", a student watching the episode from the distant future asks his teacher, "So, can the family understand the baby, or... what's the deal with that?"