Mr Horowitz wrote TV show Midsomer Murders before creating Alex Rider
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Stormbreaker, partly filmed on the Isle of Man last year, will go on general release this summer.
Six weeks of studio and location filming around the island by the star-studded cast and crew of Stormbreaker finished in August.
The release date for the film, based on the adventures of teenage super-spy Alex Rider, is 21 July.
The US rights to the £22m ($40m) movie were snapped up by Hollywood film moguls Harvey and Bob Weinstein.
The impressive crew and cast, which includes Ewan McGregor, Bill Nighy and Mickey Rourke, also had six more weeks of filming in and around London.
British author Anthony Horowitz's six books about Rider's adventures have sold millions of copies worldwide.
He wrote TV show Midsomer Murders before creating Alex Rider.