MAAJABU.

LONDON — Evidently, for spies as for C.E.O.s, the rule of thumb is the same: dress for the job you want.

“Kingsman: The Secret Service,” a British spy caper starring Colin Firth, will have its premiere here Wednesday night. Mr. Firth plays Harry Hart (code name: Galahad), a member of an elite private team of spies who battle evil (a lisping billionaire played by Samuel L. Jackson) and save the world — all from a secret headquarters at the Kingsman tailor shop, in the cozy confines of Savile Row.

As Galahad deflects bullets with a Swaine Adeney Brigg umbrella, or clicks his George Cleverley heels to reveal a knife secreted in the toe of his oxford shoe, it becomes clear: Clothes make the man.

Kingsman training, which involves a regimen of sky diving, dog training and death defying, is not yet available to the common man. But in an unexpected twist to the script, the Kingsman wardrobe is. The clothes that are so essential to “Kingsman: The Secret Service” are on sale now, thanks to a new partnership between the film’s director, Matthew Vaughn (“Kick-Ass,” “X-Men: First Class”); its costume designer, Arianne Phillips; and the website Mr Porter.

Photo

Models in looks from the Kingsman by Mr Porter collection. Credit Tom Jamieson for The New York Times

The clothing was, from the very beginning, at the core of the film. “When I wrote the script, I was actually having a suit made,” Mr. Vaughn said. “You feel a bit weird looking at yourself in the mirror when they’re working. My imagination kicked in.”

(Huntsman, Mr. Vaughn’s Savile Row tailor, at whose mirrors the seed was planted, was eventually cast as the on-screen Kingsman shop.)

Mr. Vaughn brought in Ms. Phillips, the Academy Award-nominated costume designer, to create the clothes, which from the first were intended to be sold as a stand-alone fashion collection — one not inspired by the film but used within it.

Ms. Phillips said that the clothes’ centrality to the story and their life off-screen piqued her interest. “It’s not creating a lipstick for a cute romantic comedy, or a juniors line based on a teen musical or something like that,” she said. “It is unprecedented for me to be invited by a director to work on a merchandising aspect of a film.”

Mr Porter, the men’s wear destination of the e-tailer Net-a-Porter, signed on at the outset.

Continue reading the main story Slide Show