Question: What character did Pam Ferris play in the film based on a J.K Rowling novel?

Related documents: [0]  [DOC] Pam Ferris (born 11 May 1948) is a Welsh character actress. She starred on television as Ma Larkin in "The Darling Buds of May", and as Laura Thyme in "Rosemary & Thyme", and has played parts in family films based on works by British authors, such as Miss Trunchbull in "Matilda" and as Aunt Marge in "Harry Potter and the Prisoner of Azkaban", and most recently as Sister Evangelina in "Call the Midwife". [END] 
[1]  [DOC] Harry Potter and the Prisoner of Azkaban is a 2004 British-American fantasy film directed by Alfonso Cuarón and distributed by Warner Bros. Pictures. It is based on the novel of the same name by J. K. Rowling. The film, which is the third instalment in the "Harry Potter" film series, was written by Steve Kloves and produced by Chris Columbus (director of the first two instalments), David Heyman, and Mark Radcliffe. The story follows Harry Potter's third year at Hogwarts as he is informed that a prisoner named Sirius Black has escaped from Azkaban intending to kill him. [END]  
Answer: Aunt Marge
Aunt Marge