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The film was produced by Why Not Productions for €15.4 million. It was co-produced with France 2 Cinéma, Page 114 and the Belgian company Les Films du Fleuve. Filming started on 4 October 2011 and lasted eight weeks. Locations were used Antibes, Cannes, Belgium, Paris, northern France, and Brussels. To prepare for the role, Cotillard took swimming lessons and spent a week at Marineland to learn how to direct whales. Explaining how the team adjusted to Stéphanie having no legs, Cotillard told: "When we did the first costume fitting, we had to try those pants that were empty of my legs and I had to fold my legs in the wheelchair. That image was so powerful that we kept it throughout the movie. And also we worked with amazing CGI guys."