Well, relatively. Aidan Gillen, well-known to viewers of The Wire and Queer as Folk, has been cast in the crucial role of Littlefinger on Game of Thrones.
Aidan Gillen, born in 1968, rocketed to attention as the controversial character of Stuart Alan Jones in the Russell T. Davies series Queer as Folk in 1999-2000. In 2004 he was cast as Councillor Tommy Carcetti in the third season of HBO's The Wire, the most critically-lauded television drama of the last decade. Gillen remained on the show until its final episode, taking Carcetti from a naive, young councilman to the somewhat jaded mayor of Baltimore, sacrificing his ideals on the altar of political opportunism.
Lord Petyr Baelish may be the least powerful noble lord in all of Westeros, with his holdings and property consisting of a tiny tower on the smallest of the Fingers (the various peninsulas making up the coast of the Vale of Arryn). Hence his nickname, 'Littlefinger'. However, he is a financial genius, able to rub two coins together to make fifty, and has risen through the ranks to become King Robert's Master of Coin, a key advisor to the King and a central position at court as he controls the royal coffers. Littlefinger is also a childhood friend of Lady Catelyn Stark, and a potential ally of the Starks at court in King's Landing. However, Littlefinger's true motives and goals remain debatable.
Excellent news, and near-perfect casting.