Name: Ralph Fiennes
Birthday: 22 December 1962
From: Suffolk, England
Family: Five brothers and sisters including actor Joseph and director Martha.
Showbiz CV: Ralph hasn't made many kids' films in the past, but you might know him from Wallace & Gromit: Curse of the Wererabbit. Playing the baddie isn't unusual either, as he's been some really nasty characters in some of his films. He also spends lots of time acting on stage, especially in Shakespearean roles.
Movie magic: Ralph has said he tries to make his Voldemort "deeply, truly evil". He also said his nieces and nephews came to the Potter set to see him but they didn't recognise him when they got there!
One of Ralph's real-life nephews, Hero Fiennes-Tiffin, played young Voldemort in Harry Potter and the Half-Blood Prince.
Potty about: Making sure his name is pronounced correctly - it's Rafe in case you were wondering.