Matthew Vaughn's adaptation of "The Secret Service" has a new name: "Kingsman: The Secret Service." The film's official title was revealed via EW.com in an interview with leading actor Colin Firth, who discussed his transition from more romantic leading roles -- such as "Pride & Prejudice's" Mr. Darcy and Jamie in "Love, Actually" -- to becoming an ass-kicking secret agent.

"I think what's brilliant about Matthew [Vaughn] is that he takes people's expectations and likes to mess with them," Firth told EW. "When we first met the year before, he said, 'One of the reasons I'm casting you is because you're probably the last person anyone could imagine kicking people and kicking off the villains.' And that was the surprise he wanted to pull. And he said, by the way, 'You're going to have to do it. Are you up to it?' That's one of the reasons he got me so early, to start training. He said, 'You're going to hate me by the end of it,' and sure enough, the Jackie Chan training team comes to my house and they get to work on me. I don't think I've ever enjoyed myself so much in my life. I realized that I'd made assumptions about myself that meant I had probably been neglecting something that I might have enjoyed for years if I'd got to it earlier."

Firth's trainers included Brad Allan, a kung fu black belt; Rudi Vrba, a Thai boxing world champion; stuntman Rick English; Olympic gold medal gymnast Damien Walters and more. That said, Firth hasn't abandoned his "Pride & Prejudice" roots, saying. "There's something of me in Mr. Darcy and there's probably something of that in a lot of things I've done. But I think this was one time where we were all quite conscious we used the baggage that people are familiar with in order to create this project."

Directed by Matthew Vaughn and opening October 24, "Kingsman: The Secret Service" also stars Samuel L. Jackson, Taron Egerton, Mark Strong, Michael Caine, Jack Davenport and more.