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[[File:I Know What You Did Last Summer.jpeg|thumbnail]]''[http://www.imdb.com/title/tt0119345/ I Know What You Did Last Summer]'' is a 1997 movieAmerican slasher film based on the 1973 novel of the same name by Lois Duncan. The film changes many aspects of the book, which was not a slasher novel. The film also draws inspiration from the urban legend known as The Hook.