The British Board of Film Classification (BBFC) website reveals that the duration of the long-awaited horror film is a sizable 135 minutes meaning audiences will have to put up with the evil Pennywise (Bill Skarsgård) for two hours plus - good news for fans of the source material considering King's novel spans well over 1,000 pages.
This is just an hour shorter than the 1990 miniseries starring Tim Curry.
A new look at the forthcoming film from Andy Muschietti (Mama) was released last week showing off the film's chief villain who haunts a group of kids - known as The Losers - as they enter the sewers of Maine to search for their missing friend.
Skarsgård looks to be on star-making form playing Pennywise while the film's young cast - including Stranger Things star Finn Wolfhard - aren't particularly struggling in their efforts to look terrified.
There's another King adaptation to come ahead of It. Later this month, The Dark Tower - starring Idris Elba and Matthew McConaughey - will be released, the confirmed running time of which caused concern among fans despite getting the nod from King.
The first trailer for Stephen King’s It managed to break records, being streamed 197 million times globally in just 24 hours and beating previous record holder Fast & Furious 8.
It will be released 8 September.
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