Marion Cotillard (French: [maʁjɔ̃ kɔtijaʁ] ; born 30 September 1975) is a French actress. She has appeared in independent films and blockbusters in both European and Hollywood productions and her accolades include an Academy Award from two nominations, a British Academy Film Award from two nominations, two César Awards from eight nominations, a European Film Award from two nominations, a Golden Globe Award from four nominations, a Lumières Award from two nominations and a Chopard Trophy. She became a Knight of the Order of Arts and Letters in France in 2010 and was promoted to Officer in 2016, the same year she was named a Knight of the Legion of Honour. She has served as a spokeswoman for Greenpeace since 2001. Cotillard was the face of the Lady Dior handbag from 2008 to 2017, and was the face of the fragrance Chanel No. 5 from 2020 to 2024.

Cotillard started acting as a child in theatre and TV films. At the age of 17, she had her first English-language role in the TV series Highlander (1993), and made her feature film debut in The Story of a Boy Who Wanted to Be Kissed (1994). Her breakthrough came in the successful French film Taxi (1998), which earned her a César Award nomination for Most Promising Actress. She made her Hollywood debut with a small role in Big Fish (2003); won her first César Award for Best Supporting Actress for A Very Long Engagement (2004), and had her first major English-language role in A Good Year (2006).

For her portrayal of French singer Édith Piaf in La Vie en Rose (2007), Cotillard won her second César Award, a BAFTA Award, a Golden Globe Award, a Lumières Award and the Academy Award for Best Actress, becoming the first and (as of 2024) only actor to win an Academy Award for a French-language performance, and also the second actress to have won this award for a non-English language performance. Cotillard earned several critics' awards for The Immigrant (2013) and Two Days, One Night (2014), three more Golden Globe nominations for Nine (2009), Rust and Bone (2012), and Annette (2021), and received a second Academy Award nomination for Best Actress for Two Days, One Night in 2015, her second nomination for a French-language film, becoming one of only seven actors to receive multiple Academy Award nominations for non-English language performances. She has continued to star in major English-language films such as Public Enemies (2009), Inception (2010), Contagion (2011), Midnight in Paris (2011), The Dark Knight Rises (2012), Macbeth (2015), Allied (2016), Annette (2021), and Lee (2023).

Since 2005, Cotillard has been playing Joan of Arc on stage in several countries in the oratorio Joan of Arc at the Stake. She has also narrated several documentaries and provided voice acting for the animated films Happy Feet (2006), The Little Prince (2015), April and the Extraordinary World (2015), Minions (2015), Charlotte (2021), and The Inventor (2023). Her other notable French, Belgian and Canadian films include La Belle Verte (1996), Pretty Things (2001), Love Me If You Dare (2003), Dikkenek (2006), Little White Lies (2010), It's Only the End of the World (2016), and Little Girl Blue (2023).