'The Unknown Girl' trivia and fun facts

Marion Cotillard as the protagonist

The Dardenne brothers confessed that they plan to make this film with Marion Cotillard as the protagonist, but it did not work, so they decided to do with her 'Two Days, One Night' (2014).

Fan of Dardenne brothers

Adèle Haenel has been a fan of Jean-Pierre Dardenne and Luc Dardenne for a long time, citing La promesa (1996) and El hijo (2002) as her favorite among their works.

Re-edited

The Dardenne brothers re-edited La fille inconnue (2016) post-Cannes. They had originally planed to make some very minor changes but, after consultation with their editor, decided to make more extensive cuts. The film is now 7 minutes shorter than its original Cannes version.