Born in Glasgow, Curran studied dramatic art at the Royal Scottish Academy of Music and Drama. Following his graduation in 1993 he rose to fame in the BBC series `This Life? (1997). Since then Curran has starred in a number of film and television roles, including `The League of Extraordinary Gentlemen? (2003), `24? (2010), `The Adventures of Tintin: Secret Unicorn? (2011) and more recently the role of John Knox in the feature film, `Mary, Queen of Scots? to be released in 2013. Curran also provided the voice of the character Captain MacMillan in the record-breaking video game `Call of Duty: Modern Warfare 3? (2011).