Aidan Turner and CCH Pounter Play 'The Mortal Instruments'

[caption id="attachment_140267" align="alignleft" width="220" caption="Getty Images"]Aidan Turner[/caption]

The "Instruments" have claimed two new players.

The adaptation of Cassandra Clare's "City of Bones" is turning into quite the full orchestra as both Aidan Turner and CCH Pounder have joined the ensemble, according to Clare's official blog.

Turner joins the production in the role of Luke Garroway, a calm and level-headed surrogate father figure of sorts to our heroine, Clary Fray. He also happens to be a ... well, we don't be the ones to give that away if you don't already know.

Pounder will be playing Madame Dorothea, Clary's crafty downstairs neighbor who moonlights as a storefront "Seeress and Prophetess," though her tarot cards and crystal balls serve as a front for the powerful position she actually does hold in the secret society of Downworlders.

Turner and Pounder join a cast that includes Lily Collins, Jamie Campbell Bower, Lena Headey, Jared Harris, Robert Sheehan, Kevin Durand, Kevin Zegers and Jemima West.

Aidan Turner is probably best known for his role as the vampire Mitchell on "Being Human," though he's getting a lot of buzz for his upcoming turn as Kili in "The Hobbit." CCH Pounder, who will always be one of our favorites after continuing to kick demon ass even after losing an arm in "Tales From the Crypt: Demon Knight," will probably be reprising her role as Moat when James Cameron gets around to doing his "Avatar" sequels.

"The Mortal Instruments: City of Bones" is currently in pre-production and will commence with shooting this fall under the direction of Harald Zwart ("The Karate Kid" remake, "Agent Cody Banks").