The Kieran Culkin Family Guy Devil casting is more than a one-night stunt. Culkin voices Satan in the Halloween special “Happy Hell-o-ween,” premiering Oct. 5 on Hulu, and Variety reports the Succession star will keep playing the character for a long time.
What happens in the Kieran Culkin Family Guy special
Brian and Stewie are hit by a car on the way to a Halloween party and end up in Hell, where they answer for 24 seasons of bad behavior. They annoy even the Devil, and they wind up running the underworld. In the trailer, Stewie announces that “all torture is voluntary now.”
Cast and producers behind the special
Seth MacFarlane, Alex Borstein, Seth Green, Mila Kunis, Mike Henry, Patrick Warburton and Arif Zahir return as voices. MacFarlane created the series. Rich Appel is the showrunner and an executive producer, and Alec Sulkin is among the executive producers. 20th Television Animation produces the show.
Appel said at San Diego Comic-Con that a separate holiday special will air later this fall, according to Dread Central.
Where to watch
The Kieran Culkin Family Guy special, “Family Guy: Happy Hell-o-ween,” premieres Oct. 5 on Hulu. For more on last year’s scares, see our report on the 2025 Family Guy Halloween special, and find more in our TV and streaming coverage.
Reporting from Variety, Deadline and Dread Central.
