Charlize Theron had eight personal trainers to help her master her intensely physical performance. She also trained with Keanu Reeves who was preparing for John Wick: Chapter 2 (2017).
Before filming resumed, James McAvoy broke his hand on the set of Split (2016) and had to endure all his action scenes with his injured hand.
The movie is based on Antony Johnston and Sam Hart's 2012 graphic novel The Coldest City, which revolves around a spy who has to find a list of double agents who are being smuggled into the West.
David Leitch's first solo credit as director, after co-directing John Wick (2014) with Chad Stahelski.
James McAvoy and Toby Jones starred in at least two Marvel movies. McAvoy was Charles Xavier in the X-Men franchise, and Jones was Armen Zola in two Captain America films.
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