Robert Eggers clarifies that, no, Harry Styles was never going to play Nosferatu's Count Orlok
Eggers also talked about the difficulties he's experienced with trying to get the movie made

For a brief moment last month, we believed that Robert Eggers’ long-awaited Nosferatu was both finally moving forward, and that Harry Styles himself was cast in it. Visions of an emaciated, bug-eyed Styles, his luscious locks shorn and his fingers shaped into long claws, have been burned away by the harsh light of day, however. Not only is Styles no longer attached to the project, but, as Eggers has explained, he was never meant to play the vampire Count Orlok in the first place.
Speaking to IndieWire while promoting his latest movie, The Northman, Eggers was asked about what was up with his version of Nosferatu. He said that the news we heard about last month came from him “trying to get the word out because the word did carry that Harry Styles was going to be in the movie.”
“I just want to be clear,” he continued, “that he was going to be Hutter and not Nosferatu himself.”
Instead of a rodent-toothed vampire, Styles would have played Nosferatu’s Thomas Hutter, the analog to Dracula’s Jonathan Harker that F.W. Murnau created for the 1922 film in an attempt not to get sued by Bram Stoker’s estate. While this casting choice would’ve been less fun than a singing, dancing, heavily tattooed version of Orlok, it does make a lot more sense.