Question: Gemma Christina Arterton, is an English actress, she plays the lead role in which 2016 British war comedy-drama film directed by Lone Scherfig and written by Gaby Chiappe, based on the 2009 novel "Their Finest Hour and a Half" by Lissa Evans?
Sentence (from "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).
Relevant evidence: No