Three stars cast in Ledger's 'Dr Parnassus' role

Johnny Depp, Jude Law and Colin Farrell will star in Terry Gilliam's The Imaginarium of Dr Parnassus, reports Ain't It Cool News.

The trio will take on the role played by Heath Ledger in the film.

Ledger died of an accidental overdose last month and had yet to complete his role in the fantasy film.

Ledger's character falls into a magic mirror four times during the film, allowing Gilliam to re-cast the role as a tribute to the Brokeback Mountain star.

Dr Parnassus had completed filming in London at the time of Ledger's death but still needed to undertake blue-screen work in Canada.

The Imaginarium of Dr Parnassus stars Christopher Plummer, singer Tom Waits and St. Trinian's star Lily Cole.