Jessica Chastain
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Jessica Chastain on making The Debt

Actress Jessica Chastain says she makes a great effort to prepare for her roles and her new film The Debt, in which she stars alongside Dame Helen Mirren, is no exception.

The actress tells BBC Breakfast how she learned German for the film about a group of secret agents working for the Israeli intelligence agency Mossad, and took four months of lessons in the fighting system used by the agency.

Clips of The Debt, courtesy Universal Pictures