Legend is a 2015 French-British crime thriller film written and directed by Brian Helgeland. It is adapted from John Pearson‘s book The Profession of Violence: The Rise and Fall of the Kray Twins,  which deals with the rise and fall of the Kray twins; the relationship that bound them together, and charts their gruesome career to their downfall and imprisonment for life in 1969.

Rotten Tomatoes’ consensus reads, “As a gangster biopic, Legend is deeply flawed, but as a showcase for Tom Hardy – in a dual role, no less – it just about lives up to its title.”

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http://www.imdb.com/title/tt3569230/