Author Stephen King has said Director Nikolaj Arcel's first Dark Tower film won't be entirely in step with his sprawling book series.

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In a podcast with EW , King said that the film won't be a straight adaptation of his novels, but believes fans will get behind it nonetheless."[The movie] starts sort of in medias res", said King, "in the middle of the story instead of at the beginning, which may upset some of the fans a little bit. But they will get behind it, because it is the story."Arcel's movie is the first in what will be several films based on King's seven-book series. It recently begun filming with Idris Elba and Matthew McConaughey as the gunslinger (Roland Deschain) and the man in black (Walter Padick), respectively."The thing is, it's been a long trip from the books to the film," King said about The Dark Tower as it entered production. "I'm delighted, and I'm a little bit surprised."

Lucy O'Brien is an editor at IGN’s Sydney office. Follow her ramblings on Twitter.