The Most Notorious "Talker" Runs the World's Greatest Clan is a Japanese light novel series written by Jaki and illustrated by fame. It was initially serialized on the user-generated novel publishing website Shōsetsuka ni Narō from September 2019 to July 2020. It was later acquired by Overlap who began publishing it under their Overlap Bunko imprint in June 2020. A manga adaptation illustrated by Yamorichan began serialization on Overlap's Comic Gardo manga service in June 2020. An anime television series adaptation produced by Felix Film and Ga-Crew aired from October to December 2024.