Ralph Fiennes in Harry Potter and the Deathly Hallows: Part 2 (2011)
Ralph Fiennes as Lord Voldemort in Harry Potter and the Deathly Hallows: Part 2 (2011), Harry Potter and the Deathly Hallows: Part 1 (2010), Harry Potter and the Order of the Phoenix (2007) and Harry Potter and the Goblet of Fire (2005).
Also Hero Fiennes Tiffin, Frank Dillane and Calum Sivyer as Lord Voldemort aka Tom Riddle in Harry Potter and the Half-Blood Prince (2009); Christian Coulson as Lord Voldemort aka Tom Marvolo Riddle in Harry Potter and the Chamber of Secrets (2002); Richard Bremmer as Lord Voldemort in Harry Potter and the Sorcerer's Stone (2001)