As for Allison Janney, she will be voicing the movie’s main villain, Margaux Needler, a crafty reality TV show host.
That leaves Nick Kroll, a man who has starred in animated projects like Sausage Party, Captain Underpants: The First Epic Movie and Big Mouth, to play Uncle Fester.
Janney’s voice credits include Finding Nemo, Over the Hedge, Mr. Peabody & Sherman and Minions.
There’s no word yet on who will voice Lurch, although since he’s a butler of few words, it’s not like you need a major actor to play him (although it would be funny if an A-lister was brought in to recite what little dialogue he has).