The Ministry of Ungentlemanly Warfare is a 2024 spy action comedy film directed, co-written and co-produced by Guy Ritchie, and starring Henry Cavill, Eiza González, Alan Ritchson, Henry Golding and Alex Pettyfer. Based on the 2014 book Churchill's Secret Warriors: The Explosive True Story of the Special Forces Desperadoes of WWII by Damien Lewis, the film portrays a heavily fictionalised version of Operation Postmaster.

Guy Stuart Ritchie is an English film director, producer and screenwriter. His work includes British gangster films, and the Sherlock Holmes films starring Robert Downey Jr.