The King's Man is a 2021 spy action film directed by Matthew Vaughn from a screenplay by Vaughn and Karl Gajdusek and a story by Vaughn. The third installment in the Kingsman film series, which is based on the comic book The Secret Service by Mark Millar and Dave Gibbons, the film serves as a prequel to 2014's Kingsman: The Secret Service and 2017's Kingsman: The Golden Circle.

The film features an ensemble cast that includes Ralph Fiennes (who also serves as one of the film's executive producers), Gemma Arterton, Rhys Ifans, Matthew Goode, Tom Hollander, Harris Dickinson, Daniel Brühl, Djimon Hounsou, and Charles Dance, and focuses on several events during World War I and the birth of the Kingsmen organization.  

The King's Man was released on 22 December 2021 in the United States, and on 26 December 2021 in the United Kingdom by 20th Century Studios, delayed several times from an original November 2019 release date, partially due to the COVID-19 pandemic. The film received mixed reviews from critics.