Producers behind horror franchise Insidious are turning the films into a trilogy after its new sequel shot to the top of the U.S. box office over the weekend (13-15Sep13). Insidious: Chapter 2 scared up a storm over the Friday 13th weekend to gross $41 million (£27.3 million), more than eight times its $5 million (£3.33 million) budget, and now studio bosses at Sony Pictures, Entertainment One and FilmDistrict are gearing up for a third installment of the supernatural series. Screenwriter Leigh Whannell will return to pen the script, although it is not yet known if James Wan will be back to direct. There is also no word on whether stars Rose Byrne and Patrick Wilson will reprise their roles for Insidious 3, although the Watchmen star recently suggested he was not interested in making a third movie. He told IndieWire.com, "I don't know where else you go with (his character) Josh Lambert. When you see the film, and see how it ends, it's pretty clear without giving too much away... Like, where else do you go with that guy? He's been through the ringer, and I think the movie sets it up well at the end, to be honest with you. And that's great, that's how it should end."