Official lists place The Sixth Sense in second on $673 million, although whether it is a true horror in the purest sense is debatable.
Variety in the US is reporting that the early predictions for IT CHapter 2 range from $95 to $110 million. Deadline, however, is reporting the movie could take over $120million.
One thing which could hold it back slightly is the run-time.
IT Chapter Two is clocking in at 169 minutes.
This could potentially affect box office takes if cinemas area le to schedule fewer screenings. Then again, it depends on how many screens the film opens on.
Anticipating the demand, most cinemas allocated an unprecedented number of screens for the recent Avengers Endgame, which ran for a whopping 181 minutes.
The sequel seems unsinkable. Director Andres Muschietti is returning, alongside Bill Skarsgard as Pennywise and the full line-up of the younger Losers Club.
They are matched by a stellar array of actors as their grown-up counterparts, including James McAvoy and Jessica Chastain.
The sequel will wrap up the storyline from the 1986 novel, which is similarly split into two time periods, 27 years apart.
IT CHAPTER TWO IS OUT IN CINEMAS ON SEPTEMBER 6