Aidan Gillen began his acting career as a teenager, at the age of 16 he played in a production of A Midsummer Night's Dream Niklaus List. In 1985 he had his first film role in the Irish short film The Drip under his birth name Aidan Murphy. Later he used his mother 's maiden name, not to be confused with the eponymous British actor who had played in the 1970s and 1980s, including in Doctor Who.
In 1996 he had a starring role in the IRA drama Some Mother's Son by Terry George. However, larger prominence in the UK, he gained only in 1999 as Stuart Alan Jones in the television series Queer as Folk, for which he was nominated for the BAFTA Award. He managed in the sequence with Shanghai Knights also the leap into a Hollywood production with Jackie Chan in the lead role.
In addition, Gillen also played at the theater, from 2003 to 2004 in 63 performances on Broadway in the role of Mick in Harold Pinter's The Caretaker, for which he was twice for the Tony Award nominations, and in 2007 in London's West End in David Mamet's Glengarry Glen Ross. Between 2004 and 2008 he played in 35 episodes of the U.S. series The Wire. In 2009, he played a starring role in Renny Harlin's action movie Twelve rounds. Since 2011 he has as Petyr " Littlefinger " Baelish in the HBO fantasy series Game of Thrones to see.
- 2000: BAFTA Award nomination for Queer as Folk
- 2004: Tony Award nomination for Best Featured Actor in a Play for The Caretaker
- 2004: Tony Award nomination for Drama Desk Award for The Caretaker
- 2009: IFTA Award for The Wire