Character Leah Birch
Created by Nick Kroll, Andrew Goldberg, Mark Levin, Jennifer Flackett
Other cast Nick Kroll, John Mulaney, Jessi Klein, Jason Mantzoukas
Episodes S02E03, S03E03
Running time 30 minutes
Big Mouth is an American adult animated sitcom created by Nick Kroll, Andrew Goldberg, Mark Levin, and Jennifer Flackett featuring teens based on Kroll and Goldberg’s upbringing in suburban New York, with Kroll voicing his fictional younger self.
Kat played the recurrent role of Leah Birch from seasons 1 to 4. In season 5, she was replaced with the voice talent of Chloe Fineman, as fans learned when the series was released and no sooner. The reasons for this change remain unknown.