Transworld Publishers says Rubina Ali's book will tell the story of her life in the shantytown where she grew up.
Danny Boyle cast 9-year-old Rubina in the film about an orphan from Mumbai's slums who wins a quiz show.
The filmmakers set up a trust aimed at ensuring that the children who acted in the movie get proper homes and a decent education but relations have grown tense amid disagreements over money.
Madeline Toy at Transworld Publishers said Friday that "Slumgirl Dreaming: My Journey to the Stars" wil be published in Britain in mid-July.
She said all royalties will go to Ali and Medecins du Monde, a French medical aid organization.