To help portray Edith Piaf, Marion Cotillard shaved back her hairline and shaved off her eyebrows, which were later penciled in, to better resemble the singer.
This is the second film of Marion Cotillard's to feature the song La Vie En Rose. The first was Jeux d'enfants (2003), in which the song was played prominently throughout.
This film became the third-highest-grossing French-language film in the United States in the last two decades behind 'Le Fabuleux destin d'Amélie Poulain' (2001) and 'Le Pacte des loups' (2001).