Prince of Darkness 1966

Wikipedia: Dracula: Prince of Darkness is a 1966 British horror film directed by Terence Fisher for Hammer Studios…

Dracula does not speak in the film. According to Christopher Lee: "I didn’t speak in that picture. The reason was very simple. I read the script and saw the dialogue! I said to Hammer, if you think I’m going to say any of these lines, you’re very much mistaken."

But screenwriter Jimmy Sangster, in his memoir Inside Hammer (Reynolds & Hearn, 2001), stated that "Vampires don't chat. So I didn't write him any dialogue. Chris Lee has claimed that he refused to speak the lines he was given ... So you can take your pick as to why Christopher Lee didn't have any dialogue in the picture. Or you can take my word for it. I didn't write any."