It depends on which Harry Potter Movie on who plays the character of Lord Voldemort. In the 1st one, he is played by Richard Bremmer, in the 2nd and 3rd movies Voldemort is not in the movie as an actual character. In the 4th and 5th movie he is played by actor Ralph Fiennes. Lord Voldemort does not appear as a character in the 6th and Harry Potter movie. In the 7th and 8th movies, he again is played by actor Ralph Fiennes.