The ninth season of animated television series Family Guy first aired on the Fox network in eighteen episodes from September 26, 2010, to May 22, 2011, before being released as two DVD box sets and in syndication. Family Guy follows the dysfunctional Griffin family—father Peter, mother Lois, daughter Meg, son Chris, baby Stewie and dog Brian, all of whom reside in their hometown of Quahog.

Stewart Gilligan "Stewie" Griffin is a fictional character from the animated television series Family Guy. He is voiced by the 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. Stewie was created and designed by MacFarlane himself, who was asked to pitch a pilot to the Fox Broadcasting Company, based on The Life of Larry and Larry & Steve, two shorts made by MacFarlane featuring a middle-aged man named Larry and an intellectual dog, Steve.