Didier Decoin (born 13 March 1945) is a French screenwriter and writer awarded the Prix Goncourt in 1977. He is the son of filmmaker Henri Decoin. He began his career as a newspaper journalist at France Soir, Le Figaro and VOD, and radio Europe 1. At the same time he started writing.

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https://en.wikipedia.org/wiki/Didier_Decoin