The project was first publicly reported in 2012. The two principal stars, Dane DeHaan and Cara Delevingne, were announced in May 2015. On 19 August 2015, Clive Owen signed on to play Commander Arün Filitt in the film. The budget, €197 million, is by far the largest ever assembled for a French film. Previously, Asterix at the Olympic Games was the most expensive, at €78 million, just ahead of Besson's The Fifth Element (€75 million). By the end of August 2015, Besson said in an RTL radio interview that shooting the film in France was too expensive. Because it was filmed in a foreign language (English), Besson was unable to benefit from tax credits, despite preferring to produce the film in France and create jobs for 1,200 crew members. The criteria to obtain these tax credits were then adapted accordingly. In May 2015, it was announced Fundamental Films would invest US$50 million in the film.