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Two different films are called Kingsman 3
Searches for the cast of Kingsman 3 have two possible answers, and conflating them is why the question feels unanswerable.
The third film released in the franchise is The King’s Man (2021), a prequel set around the First World War. The full cast of Kingsman 3 in that sense is the table above: Ralph Fiennes, Gemma Arterton, Rhys Ifans and the rest, none of whom appear in the modern films.
The other Kingsman 3 is the one most people mean: a third film continuing Eggsy’s story after The Golden Circle. That film is in development and has never been made.
The full cast of Kingsman 3: the actors and their roles
Because it is a prequel, the cast of Kingsman 3 has no overlap with the films that preceded it. That is the single most useful fact about it, and the reason a full comparison of the Kingsman cast across all three films is more helpful than a list of one. The kingsman cast people picture (Egerton, Firth, Strong) is not in this film at all.
The names worth knowing from the kingsman 3 cast:
- Ralph Fiennes as Orlando Oxford, the lead, the Duke whose reluctance drives the plot
- Rhys Ifans as Grigori Rasputin, the film’s most theatrical performance and its most-clipped sequence
- Tom Hollander as King George V, Kaiser Wilhelm II and Tsar Nicholas II, one actor as all three cousins, which is the boldest choice in the film
- Harris Dickinson as Conrad Oxford, the son
- Djimon Hounsou as Shola, and Gemma Arterton as Polly Wilkins
- Charles Dance as Herbert Kitchener, and Daniel Brühl as Erik Jan Hanussen
Two of these actors appear elsewhere in this reference: Djimon Hounsou is also in the Captain Marvel cast, playing Korath, the kind of overlap a single-film cast page can never show you.
The complete Kingsman cast list, film by film
A list of one film’s credits answers less than the comparison does. Across the franchise:
- The Secret Service (2014) — Taron Egerton, Colin Firth, Mark Strong, Samuel L. Jackson, Michael Caine
- The Golden Circle (2017), the same core, plus Julianne Moore, Halle Berry, Pedro Pascal, Jeff Bridges, Channing Tatum
- The King’s Man (2021), an entirely new cast, listed in full above
Seen as a list, the pattern is obvious: the franchise reset the kingsman cast completely for the third film. Anyone searching for the kingsman 3 cast expecting to see Egerton’s name is searching for a film that has not been made, and finding the cast of one that has.
The Kingsman 3 that has not been made
Matthew Vaughn has been consistent that a third Eggsy film is coming and equally consistent that it is not finished. He has described writing it, and has said the beginning and the ending are settled while the second act is not.
What does not exist: a screenplay in production, a cast, a start date or a release date. Taron Egerton has spoken about wanting to return, and reports have disagreed about how firmly he is attached, which this reference treats as a reason to record nothing rather than to pick a side.
The practical read: an announced writer who is the director and the rights holder is a stronger position than most stalled projects manage, and it has still produced no film in the years since The Golden Circle. The status is in development, not confirmed, and it will stay there until something dated appears.
Watch order, since the prequel complicates it
Release order is the right order. The King’s Man was made to be watched after the two modern films: it ends on a scene that only works if you already know where the organisation ends up — so viewing it first as “the chronological beginning” spends a reveal for nothing.