Aunt Sponge

Aunt Sponge is James' aunt, Spiker's sister, and one of the main antagonists of the film. It is unknown whether Spiker and Sponge are the sisters of James' father or mother, or possibly his great-aunts since the book's illustrations depict them to be elderly. She is played by Miriam Margoyles in the movie.

History
After James' parents get eaten by a rhinoceros, he is sent to live with his mean aunts Spiker and Sponge. In the beginning when James awakens from being asleep in his room Aunt Spiker and Aunt Sponge come into his room and Aunt Sponge calls him a lazy little bug and along with her sister orders him to get up and to get work. Later on in the movie Aunt Sponge is seen sitting next to Aunt Spiker in a chair and tells her sister that if she takes off both her socks she'll see her toes to which Spiker tells Sponge to not forgot how much her tummy shows. Aunt Sponge then notices James reading his travel map to New York City and asks why he isn't working to which James replies "I've finished the wood".

A lazy, greedy, selfish, and morbidly fattest woman, and equally as cruel and repulsive as her older sister Spiker. Sponge is more gluttonous, thinking of eating the peach while Spiker seizes upon the money-making opportunities it will bring. Sponge is more or less dominated by Aunt Spiker, but attempts to save her own life instead of Spiker when she sees the giant peach rolling towards her. Nonetheless, they trip up over each other and both meet the same end.