On the day of filming the sex scene, Gerard Butler had a nasty throat infection and Thandiwe Newton refused to kiss him. Guy Ritchie then improvised and revised the scene into the very funny montage.
Christopher Nolan said that it was his performance in this film that convinced him to cast Tom Hardy in Origine (2010) and L'ascension du chevalier noir (2012).
The house number where One-Two lives is three four.
According to director Guy Ritchie, this was to be the first in a trilogy. Before the credits, there is a title card that reads "The Wild Bunch will return in The Real RockNRolla", hinting that this would've been the title of the next installment.
The character Uri (Karel Roden) appears to be inspired by real-life Russian businessman Roman Abramovich. He physically resembles Abramovich and conducts a business meeting at Wembley stadium which echoes Abramovich's status as owner of Chelsea Football Club.