In 2013 , Seydoux was nominated for Best Actress at the 38th César Awards for her role as Sidonie Laborde in Benoît Jacquot 's '' Farewell , My Queen '' . Later that year at Cannes , '' Blue Is the Warmest Colour '' won the '' Palme d'Or '' and the jury , headed by Steven Spielberg , took the unusual move of awarding the prize not just to the director Abdellatif Kechiche , but also to the film 's two stars , Seydoux and Adèle Exarchopoulos
38th César Awards
38th César Awards
Léa Seydoux