A still quite coy Colin Firth opened up -- ever so slightly -- about the return of Harry Hart in "Kingsman: The Golden Circle."

In an interview about his upcoming film "Bridget Jones’s Baby," Firth explained to Collider it's his "duty to be cryptic" about reprising his role from the original film, "Kingsman: The Secret Service." This comes as no surprise to fans of the franchise, as Harry took a bullet to the head near the end of the first movie based on David Gibbons and Mark Millar’s Marvel Icon comic book series, “The Secret Service.”

"It’s no secret that I’m involved, somewhere and somehow," Firth said. "From what I’ve been able to gather, it’s not going to feel like a conventional sequel. It’s going to be something that feels very much its own thing. I’m very optimistic about it."

Firth was first linked to the sequel with a cryptic teaser poster featuring Harry's signature glasses and the words, "Reports of my death have been greatly exaggerated." In July, he appeared on set in an Instagram photo posted by sequel co-star Pedro Pascal.

"[A] lot of people have speculated and a lot of people have come to the wrong conclusions about it," Firth continued, no doubt fueling further speculation about the details of his return and the overall story of the sequel.

The nature of Firth’s return is only one of the casting mysteries surrounding the Kingsman. Rock star Elton John, who has not appeared onscreen in a significant role since 1975's "Tommy," was ">added to the cast in late May.

"Kingman: The Golden Circle," directed by Matthew Vaughn, is currently in production, with an expected release date of June 16, 2017.