Fox, Hulu and 20th Television Animation have confirmed further voice cast additions for "Stewie," the "Family Guy" spin-off, including Aaron Lee and Jessica Lowe alongside previously announced stars Kenan Thompson, Vanessa Bayer and Melissa O'Neil. Seth MacFarlane, who created the series with Kirker Butler, will voice both Stewie and a new classmate named Bean, while Mike Henry takes on a second role as BJ, son of his existing "Family Guy" character Bruce. The expanded casting reveal underlines how much of the "Family Guy" universe is being carried over into the new setting, with several actors doubling up on characters connected to the parent show.

The series follows Stewie after he is expelled from his old preschool and forced to attend a new one alongside unfamiliar classmates, using his gadgets to turn dull school days into elaborate adventures. Newly detailed roles include Lee as Skunk, a hundred-year-old class turtle, and Lowe as Caroline, an influencer-obsessed classroom rival, joining Thompson as classmate Royal, Bayer as teacher Morgan and O'Neil (in her animation debut) as love interest Wanda. "Stewie" received a two-season order from Fox in March, with a premiere set for the 2027-28 season and next-day streaming on Hulu; MacFarlane executive produces via Fuzzy Door, with 20th Television Animation as the studio.