Winslet won an Oscar earlier this year for her performance in The Reader
Oscar-winning actress Kate Winslet is to provide the English narration for an Icelandic documentary exploring autism.
Directed by Fridrik Thor Fridriksson, The Sunshine Boy follows a mother's attempt to understand her severely autistic 11-year-old son.
The film sees her travel halfway across the world to Texas to the well-known autism therapist Soma Mukhopadhyay.
The Sunshine Boy will have its international premiere at the Toronto Film Festival next month.
"I am delighted and honoured that Kate agreed to do the narration," said Margret Dagmar Ericsdottir, who gives the film's first-person account.
"Her contribution plays an instrumental role in increasing awareness for autism, which many claim is the world's fastest-growing epidemic."
Icelandic musicians Bjork and Sigur Ros also contribute to the film.
Winslet won a best actress Oscar earlier this year for her performance in the post-World War II drama The Reader.