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The adaptation of Jose Saramago's Nobel Prize-winning novel, which focuses on an epidemic that leaves victims suffering from white blindness, will screen on May 14 when the festival opens.
Julianne Moore, Mark Ruffalo, Danny Glover and Gael Garcia Bernal star in the film.
Mereilles has previously directed City of God and The Constant Gardener.
Other films that will screen at Cannes include Clint Eastwood's Changeling, Woody Allen's Vicky Christina Barcelona and Barry Levinson's satire What Just Happened?, starring Robert De Niro.
This year's Cannes Film Festival takes place from May 14 to 25.
