The Coen brothers are rewriting the script for Unbroken, after "extremely choosy" director Angelina Jolie searched for weeks for the right writers.

Unbroken is a 2010 book by Seabiscuit author Laura Hillenbrand about World War II solider Louis Zamperini. A former Olympic runner, Zamperini's plane crashed in the Pacific Ocean; he spent 47 days on a raft only to be captured by the Japanese and spend two years in an internment camp as a POW.

Joel and Ethan Cohen usually direct the movies they write—Fargo, The Big Lebowski, No Country For Old Men, True Grit—but "take on assignments in special cases." We guess Angelina Jolie calling you up would be a special case.

Jolie signed on in December as director and producer. She has previously directed In the Land of Blood and Honey, a 2011 film about the Bosnian War. Other drafts of the Unbroken script were written by William Nicholson (Gladiator) and Richard LaGravenese (Water For Elephants), but presumably Jolie wants the famous Coen brothers to take the screenplay to the next level.

Their next movie is Inside Llewyn Davis, which comes out later this year.

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[via THR]