It's official: Mahershala Ali has signed on to star in a potential third season of True Detective.

We say 'potential' True Detective because HBO programming president Casey Bloys is yet to make a final decision on a commission or attach a director, despite being impressed with writer Nic Pizzolatto's scripts.

"I have read five scripts for a third season," Bloys told reporters at the TCA press tour on Wednesday (July 26).

"I'm very, very impressed and excited about what I've read. I don't want to give away the storyline, but I really think they're terrific."

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However, Oscar-winning Moonlight star Mahershala Ali has already signed up should True Detective get an official commission – as evidenced by a photo of the show's logo on his Instagram account.

It was last summer at the TCAs when Bloys denied that True Detective was "dead", despite the harsh backlash to the show's second season.

"We are hoping for a third season," the executive said last August. "It's a very valuable franchise for us... [But] I'm not sure we have the right take for a third season yet."

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A year later, the project has moved forward just slightly. Earlier in 2017, season one's Emmy-nominated star Matthew McConaughey made it clear that he's willing to return.

"If that thing was written well and it came up again, I wouldn't hesitate for a second," he explained. "Oh, I'm open to it for sure."

So what are you waiting for HBO?

From: Digital Spy