Williams joins 'Shutter Island' cast

Michelle Williams has signed up to star opposite Leonardo DiCaprio in Martin Scorsese's new film Shutter Island.

The Brokeback Mountain actress will play DiCaprio's wife in the 1950s-set film about a US marshal who is dispatched to the New England island.

DiCaprio, who is collaborating with Scorsese for the fourth time in the film, will star as the marshal who tries to hunt down a woman who has escaped from a hospital for the criminally insane.

Ben Kingsley and Mark Ruffalo have also signed up for the movie.

Williams is also shooting Lukas Moodysson's film Mammoth alongside Gael Garcia Bernal.