Colin Farrell is in negotiations to star in the second season of HBO’s “True Detective,” sources confirm.

He’s the first actor to board season 2 of the anthology series after months of rumors and Internet speculation.

HBO execs hinted that the full cast would be announced soon at Thursday’s TCA presentation.

““I think the people we will cast will be well-known names,” president Michael Lombardo said. “But that wasn’t our ambition (in season 1).”

It’s unknown whether Farrell will be joined by a female co-star, as rumored, but creator Nic Pizzolatto has confirmed that the new season will be set in California and feature at least three lead roles.

“It takes place in California — not Los Angeles, but some of the much lesser known venues of California — and we’re going to try to capture a certain psychosphere ambiance of the place, much like we did in season 1.”

“True Detective” earned multiple Emmy nominations on Thursday, including lead actor nods for both Matthew McConaughey and Woody Harrelson, and a best drama nomination.

With an average gross audience of 11 million viewers, the show’s ratings were the most for an HBO rookie series since “Six Feet Under” in 2001.

HBO declined to comment on this report, which was first reported by Deadline, but did say at their TCA session that the second season would be “more exciting” than the first.

“Nic (Pizzolatto) is an incredibly talented writer, and he’s blown us away with the first two episodes,” Lombardo said.

Farrell, who recently starred in “Saving Mr. Banks,” recently wrapped production on “Miss Julie” opposite Jessica Chastain.

He is repped by CAA and LBI Entertainment.