- Development Hell: This movie has been percolating for quite a while - since the late 1990's, in fact. Quentin Tarantino's name was tossed about as a director in the early going, but that never really came to anything. Then Steven Soderbergh was going to direct with George Clooney as Napoleon Solo, but both ended up dropping out (Soderbergh over script and budget disagreements, Clooney for health reasons). Guy Ritchie then agreed to direct, Clooney was replaced by Tom Cruise, and Henry Cavill was approached to play Illya Kuryakin, but when Cruise dropped out to make Mission: Impossible Rogue Nation, Cavill was given the part of Solo and Armie Hammer was cast as Kuryakin.
- Dueling Movies: With Kingsman: The Secret Service.
- Fake Nationality: The Movie! Pretty much all of the major characters are pretending - Englishmen Henry Cavill and Jared Harris as the Americans Napoleon Solo and his handler Saunders, American Armie Hammer as Russian Illya Kuryakin, Swedish Alicia Vikander as the German Gabi Teller and Australian Elizabeth Debicki as the English Victoria Vinciguerra. Only four principal characters - Waverley, Oleg, Uncle Rudi and Alexander Vinciguerra - are represented by actors from their 'proper' nations.
- Irony as She Is Cast: British Henry Cavill plays a Fake American as Solo, while Armie Hammer, a real American, plays Russian Kuryakin.
- Production Posse:
- Just as Mark Strong followed up appearing in Rocknrolla with the villain role in Sherlock Holmes (2009), Jared Harris returns for his second Guy Ritchie film in a row.
- The projectionist during Kuryakin's debriefing of Solo is Guy Ritchie's buddie and international soccer superstar David Beckham in heavy disguise.
Trivia / The Man from U.N.C.L.E. (2015)