"The Grey" filmmaker Joe Carnahan revealed he's completed his screenplay for Sony's adaptation of the popular video game franchise "Uncharted."

He posted a photo of the draft on Instagram, accompanied by the caption, "Done and Dusted." "Now the REAL work begins," he continued. "If there's a monstrously cool action script in Hollywood right now, I wanna read it, 'cuz this thing is a BEAST."

Done and Dusted. Now the REAL work begins. If there's a more monstrously cool action script in Hollywood right now, I wanna read it, 'cuz this thing is a BEAST.

A photo posted by Joe Carnahan (@carnojoe) on

This represents one of the first production milestones that "Uncharted" has actually hit. Originally slated for release on June 10, 2017, the project has been sitting at Sony for a few years, cycling through potential leads and directors, including Mark Wahlberg and Seth Gordon. It has since found a director in Shawn Levy, but the search for a star is ongoing.

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"Uncharted" follows the archaeological adventures of Nathan Drake, a purported descendant of Sir Francis Drake, as he travels the world in searches of riches and artifacts. The franchise debuted in 2007, and released its most recent entry, "Uncharted 4: A Thief's End," last year.

Carnahan's credits include "The Grey," "The A-Team" and "Smokin' Aces." Levy directed "Night at the Museum" and "The Internship," and was an executive producer on Netflix's "Stranger Things."