Stewie Griffin

Stewie Griffin is the son of Lois & Peter Griffin.

History
Someone dressed in a Stewie costume was at the building of Family Guy World. He said that he was the "It boy" of 2006.

Non-canon
Stewie attended the Simpsons' 25th season party.

Stewie and the Griffin family have their car stolen just outside Springfield. They visit Springfield where they meet the Simpsons and become friends. Stewie bonds with Bart, and makes a prank call to Moe, but misses the point of it and tells Moe that his sister is being raped. Stewie begins to look up to Bart, skateboarding, using a slingshot and wearing the same clothes. After he sees Nelson bully Bart, Stewie kidnaps him and tortures him, and later kidnaps other people who hurt or annoy Bart, and Apu. He takes Apu because he wanted to say "I took Apu". Bart tells Stewie that he can't be friends with him as he's crazy. When the Griffins return to Quahog, Stewie is still upset over Bart and writes on his blackboard "I Will Not Think About Bart Anymore".