At Which film festival does Barry Keoghan starring The Killing of a Sacred Deer film won best screenplay award in 2017?
The Killing of a Sacred Deer:  It was selected to compete for the Palme d'Or in the main competition section at the 2017 Cannes Film Festival. The Killing of a Sacred Deer:  At Cannes, Lanthimos and Filippou won the Best Screenplay award.
i don't know