Gillen was born in Drumcondra, Dublin, and educated at St. Vincent's C.B.S. in Glasnevin. He began his acting career as a teenager, with the Dublin Youth Theatre, playing Nick Bottom in A Midsummer Night's Dream at the Project Arts Centre, before moving to London.[3]
Career
Gillen played Stuart Alan Jones in the groundbreaking Channel 4 television series Queer as Folk, and its sequel, for which he received a British Academy Television Award nomination for Best Actor. He was nominated for a Tony Award for his highly acclaimed Broadway role in Harold Pinter's The Caretaker,[4] and has also been nominated for an Irish Times Theatre Award for his portrayal of Teach in the Dublin Gate Theatre's 2007 production of David Mamet's American Buffalo.[5]
In 2004, having been spotted by producers in The Caretaker, Gillen portrayed Tommy Carcetti in the acclaimed HBO series The Wire, for which he received an Irish Film & Television Award for Best Actor in a Lead Role in Television. In 2008, he was named an "Irish cult hero" by the Sunday Tribune. He appeared in the 2009 film 12 Rounds, and in July of that year, he appeared in the one-off BBC2 drama Freefall. He co-starred as Phil Hendrick in the British drama Thorne.
In 2011, Gillen began playing Petyr "Littlefinger" Baelish on the award-winning HBO series Game of Thrones, for which he received his second Irish Film & Television Award nomination.[6] He starred with as cop killer Barry Weiss in the British crime-thriller Blitz, and in the British horror film Wake Wood. He played crime boss John Boy in the acclaimed Irish crime-drama Love/Hate,[7] for which he received his third Irish Film & Television Award nomination and second win.
In 2012, Gillen played a CIA agent in the opening of The Dark Knight Rises and starred in the British spy-drama Shadow Dancer. He was announced as the new host of the music show Other Voices.[8][9] He is set to star in the comedy-drama Calvary and the BBC five-part thriller