What is the name of this Irish horror fantasy thriller film starring Jonny Lee Miller and Gemma Arterton?
Gemma Arterton: Gemma Christina Arterton (born 2 February 1986) is an English actress. Gemma Arterton:  She is known for her roles in the fantasy films "Clash of the Titans" (2010), "Prince of Persia: The Sands of Time" (2010), "Byzantium" (2013) and as the character Gretel in "" (2013).
i don't know