Warner Brothers has confimed this info!

"BURBANK, Calif.--(BUSINESS WIRE)--Aug. 4, 2004--Ralph Fiennes ("Red Dragon," "Maid in Manhattan," "Schindler's List") and Miranda Richardson ("The Hours," "Sleepy Hollow," "The Crying Game") have joined the all-star cast of Warner Bros. Pictures' "Harry Potter and the Goblet of Fire," the fourth film adaptation of J.K. Rowling's popular Harry Potter novel series. Fiennes will play Harry Potter's nemesis, the evil Lord Voldemort, and Richardson takes on the role of muckraking journalist Rita Skeeter."

Find out more