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Venice Film Festival to open with "Gravity"

This year's Venice Film Festival opening will be out of this world.

Alfonso Cuaron's ("Harry Potter and the Prisoner of Azkaban" and "Children of Men") sci-fi thriller "Gravity," starring Sandra Bullock and George Clooney, will open the 2013 Venice Film Festival, making its world debut at the 70th annual event, film festival organizers announced Wednesday.

In the film, Clooney and Bullock portray astronauts who get stuck in space after their shuttle encounters a meteor shower. The 3D movie will premiere in Italy on Aug. 28, before opening in theaters worldwide in October.

Organizers said the upcoming premiere will mark the first time a 3D movie opened the festival.

Cuaron, who wrote the film with his son Jonas, appeared at the Venice Film Festival in 2001 with "Y tu mama tambien," which won the Golden Osella award for best screenplay.

The Venice film event, the world's oldest film festival, winds down Sept. 7. The festival's complete lineup will be announced later this month.

Last year, "The Reluctant Fundamentalist," starring Kate Hudson and Liev Schreiber, opened the Venice Film Festival.