Prince Vlad's scream after he drives his sword into the cross is not the voice of Sir Gary Oldman. Lux Interior, lead singer of punk band The Cramps, recorded the scream, and it was dubbed in.
Producer and director Francis Ford Coppola explains on the DVD commentary that Mina and Harker's wedding was a re-shoot done at a Los Angeles Greek Orthodox church. They filmed the entire ceremony with a genuine Romanian Orthodox minister, and realized afterwards that Winona Ryder and Keanu Reeves may have really been married to each other, not in any legal sense, but "under the eyes of God" as Ryder claims. Reeves has since confessed that he often gets text messages from Ryder that read "Hello, husband", and that they are both completely fine with it.
At the first cast meeting called by director and producer Francis Ford Coppola, he got all of the principal actors and actresses to read the entire Bram Stoker novel out loud to get a feel for the story. According to Sir Anthony Hopkins, it took two whole days to complete.
Sir Gary Oldman said that when he first read the script, he decided it would be worth doing the movie just so he could feel what it would be like to say to someone, "I've crossed oceans of time to find you."
Sir Gary Oldman hired a singing coach to help him lower his voice by an octave to help him give Dracula a more sinister quality.