“ It: Welcome to Derry ” hit 5.7 million viewers through in its first three days.

That total, a combination of Nielsen measurement of viewers on HBO’s linear channel and Warner Bros. Discovery’s own data regarding streams on HBO Max, puts the horror series in third place when compared to all other series premieres since HBO Max was launched. Only “House of the Dragon” and “The Last of Us” outrank it, according to WBD. (The company did not provide three-day totals to make comparisons with, though “House of the Dragon” premiered with just under 10 million viewers and “The Last of Us” premiered with 4.7 million viewers, both measured in just one day.)

Set in the world established by the 1986 novel “It” by Stephen King, and expanding the cinematic universe from Andy Muschietti’s feature fi

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