Agatha Trunchbull, also known as Miss Trunchbull, Miss Agatha Trunchbull, or simply The Trunchbull, is the fictional headmistress of Crunchem Hall Primary School, and the main antagonist in Roald Dahl's 1988 novel Matilda and its spinoffs: the 1996 film Matilda, the 2011 musical Matilda, and the 2022 film Matilda the Musical. Wikipedia