Oscar winner Kate Winslet (photo) has agreed to lend her voice for the narration of the documentary film about autism The Sunshine Boy, directed by veteran Icelandic filmmaker Fridrik Thór Fridriksson.

Fridriksson spent four years on the project, two of them following producer Margret Dagmar Ericsdottir (Frontier Filmworks) as she meets world experts on autism in the hope to improve the condition of her 11-year-old autistic son Keli. The director of the Oscar nominated Children of Nature, who witnessed Keli's first efforts to communicate, said that Sunshine Boy is probably the most important film he's ever made. Iceland top singer Björk and the band Sigur Ros have contributed to the film, supported by Nordisk Film & TV Fond.

The Sunshine Boy will have its international launch tomorrow in Toronto in the Real to Reel section. As such, it is part of the 13 Nordic titles eligible for Nordisk Film & TV Fond International Cinema Distribution Support. Fridriksson will attend Nordisk Film & TV Fond's High Five Toronto Event tomorrow, where footage of his latest film Mamma Gógó will be unveiled.