Gemma Arterton performed in a film.
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 Hansel and Gretel : Witch Hunters ( 2013 ) . She plays the lead role in Their Finest ( 2017 ) . Their Finest is a 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 .