Turned down a role in Bel Ami (2012). When Robert Pattinson met Cotillard in Cannes and told her he was doing a film of Guy de Maupassant's classic French novel, she expressed bemusement: "But why make it in English?".
Is the fifth actress to win the Best Actress in a Leading Role Oscar for portraying a female singer in a biography; the first being Luise Rainer as Anna Held in The Great Ziegfeld (1936), followed by Barbra Streisand in Funny Girl (1968), Sissy Spacek as Loretta Lynn in Coal Miner's Daughter (1980) and Reese Witherspoon as June Carter Cash in Walk the Line (2005).
Announced that she and long-time boyfriend Guillaume Canet are expecting their first child together. [10 January 2011].
Played Joan of Arc in the concert "Jeanne d'Arc au Bûcher" (Joan of Arc at the Stake) twice: in 2005 in Orléans, France and in 2012 in Barcelona, Spain. Her mother also played Joan of Arc in the same concert in 1992.
Has two younger brothers: Guillaume and Quentin, they are identical twins (born on 6 November 1977). Guillaume Cotillard, is a screenwriter and director and Quentin Cotillard works as a sculptor, living in San Francisco, California with his Irish-American wife Elaine O'Malley Cotillard, a former Dutch National Ballet dancer and fashion designer.