Miss Agatha Trunchbull is the fictional headmistress of Crunchem Hall Primary School, and the main antagonist in Roald Dahl's 1988 novel Matilda and its adaptations: the 1996 film Matilda, the 2011 musical, and the 2022 musical film adaptation. She is said to look "more like a rather eccentric and bloodthirsty follower of the stag hounds than the headmistress of a nice school for children".