Plans for a biopic of opera singer Maria Callas have been unveiled at the Cannes Film Festival.

Whale Rider moviemaker Niki Caro will direct and write the film, which will focus on the legendary soprano's affair with shipping magnate Aristotle Onassis, who eventually went on to marry assassinated U.S. President John F. Kennedy's widow Jacqueline Kennedy.

Caro says, "I have a great fascination for Maria Callas, who was such a powerful woman and artist, but also troubled and stuck in this very destructive relationship."

Filming will begin in the autumn (14), but no casting has yet been announced.

Callas was most recently portrayed by Spanish actress Paz Vega in Nicole Kidman's critically-slammed Grace of Monaco film.