The big screen adaptation of Stephen King's IT  is primed to become the highest-grossing R-rated horror movie of all time at the domestic box office, passing up The Exorcist. IT has been slaying records ever since it's debut in theaters earlier this month, the biggest opener for a horror film ever. On top of that, it became the highest-grossing King movie of all time in less than a week, pushing The Green Mile out of the top slot of the 30-plus movies adapted from the author's works to date.

Now, following its $60 million gross at the domestic box office last weekend, IT is on its way to setting its biggest record yet. According to Deadline, the film will surpass the 1973 horror film classic The Exorcist at the domestic box office on Thursday when its projected to pass the $233 million threshold. Combining its initial theatrical run and subsequent re-releases (including an extended direcotr’s cut in 2010), The Exorcist has made $232.9 million at the domestic box office. Adjusted for inflation the film would dwarf IT, however, with a staggering gross of $983.2 million (making it 9th place on the all-time list of all films), according to Box Office Mojo.

It's important to point out that while IT has nabbed the top slot for R-Rated horror films, it's not the top-grossing horror film of all time stateside considering all ratings. Stephen Spielberg's 1975 juggernaut Jaws (shockingly rated PG at the time) has grossed $260 million domestically to date ($1.1 billion adjusted for inflation), while the PG-13-rated M. Night Shyamalan 1999 mind-bender The Sixth Sense, while supernatural in nature but still considered horror, grossed $293.5 million ($511.8 million adjusted).

Linda Blair as Regan in The Exorcist

No matter the case, IT's domestic box office achievement is an amazing one, considering the heights its scaled in less than two weeks of release. And with Halloween less than six weeks away, the film should easily have enough legs to surpass the $300 domestic mark to take the modern-day top slot among all horror films, no matter the rating or the sub-genre. Deadline projects that IT will reach the $270 million mark by the end of this week.

The summer has been a very lucrative one for Warner Bros. which not only produced and distributed IT and the season's top-grossing film Wonder Woman, but Annabelle: Creation, the latest film entry in The Conjuring Universe. The film was teetering on breaking the $100 million domestic barrier Monday with $99.8 million in ticket sales, so it should easily pass the benchmark once Tuesday's numbers are released.

NEXT: The Exorcist Director Filmed an Actual Exorcism for His New Movie

Sources: DeadlineBox Office Mojo

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