In pictures: Stars turn out for Dardenne brothers' 'The Unknown Girl'

Jean-Pierre and Luc Dardenne hope to clinch a record third Palme d'Or with their latest film 'The Unknown Girl', featuring French rising star Adèle Haenel.

Belgian-Burkinabe actress Nadege Ouedraogo stars in 'The Unknown Girl', a social-realist drama about a doctor haunted by the death of an unidentified immigrant.

The Dardenne brothers and the cast pose at the top of the steps. 'The Unknown Girl' has been described by FRANCE 24's film critic as "hardly the most powerful Dardenne work".

Czech supermodel Eva Herzigova grabs the attention of red carpet photographers with her Marylin Monroe-inspired white dress.

American fashion model Bella Hadid turns heads on the red carpet with her plunging scarlet gown with soaring split.

French actress Julie Gayet, who shot to worldwide fame in 2013 when her affair with president François Hollande was revealed, walked the red carpet to attend the 'The Unknown Girl' premiere.

Filippino director Brillante Mendoza (centre) leaves the Palais des Festivals after the screening of 'Ma'Rosa', a movie about police corruption presented in official competition.

Brazilian supermodel Alessandra Ambrosio hit the red carpet in a daring silver dress.

British model Jourdan Dunn turned heads with her ivory strapless gown adorned with floral patterns.

French actress Laetitia Casta wore a sheer black dress with a thigh-high split to attend the 'The Unknown Girl' premiere.

South Korean director Na Hong-Jin (centre-right) poses with his cast before the premiere of 'The Strangers', a film noir about an investigation of supernatural murders in a quiet little Korean village.