Ciarán Hinds (born February 9, 1953) is a Northern Irish actor. He is best known for his starring role as Gaius Julius Caesar on the HBO series Rome and as Aberforth Dumbledore in Harry Potter and the Deathly Hallows: Part 2. He has also appeared in the Steven Spielberg film Munich, the British crime drama Above Suspicion, Ivanhoe, and Cold Lazarus. He is also known for his roles as Russian President Alexander Nemerov in the 2002 film adaptation of Tom Clancy's book The Sum of All Fears, as Richard Firmin in the 2004 film version of Andrew Lloyd Webber's musical Phantom of the Opera, and as Roarke/The Devil (alias Mephistopheles) in the 2012 film Ghost Rider: Spirit of Vengeance, taking over the role from Peter Fonda. He will portray Steppenwolf in the upcoming Justice League in 2017, alongside fellow Thrones actor Jason Momoa.