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).

Charlize Theron cracked two teeth while filming.

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.

Charlize Theron spent five years developing this project.

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.

The movie was previously called "The Coldest City."

based on the British graphic novel The Coldest City.

Eddie Marsan previously worked with Charlize Theron in Hancock (2008).

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.

Eddie Marsan and James McAvoy previously starred together in Filth (2013).

James Faulkner (C) and Jóhannes Haukur Jóhannesson (Yuri Bakhtin) have both previously starred in Game of Thrones (2011) as Randyll Tarly and Lem Lemoncloak respectively.

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