Director Paul Greengrass has set Amy Ryan and Greg Kinnear to star alongside Matt Damon in the untitled Iraq war thriller that begins shooting today in Spain for Universal Pictures.

Pic is inspired by Rajiv Chandrasekaran’s nonfiction book “Imperial Life in the Emerald City: Inside Iraq’s Green Zone.”

Greengrass and Brian Helgeland turned the premise into a fictional thriller set in the “Green Zone,” a walled and fortified area where U.S. troops stay during the Iraq occupation. There, critics say, flawed decisions are made because leaders are separated from the realities of life in war-torn Iraq.

Damon plays an officer who teams with a senior CIA officer to search for evidence of weapons of mass destruction. Ryan will play a New York Times foreign correspondent sent to Iraq to investigate the U.S. government’s WMD claims. Kinnear plays another CIA officer. Antoni Corone has been cast as a colonel.

Working Title partners Tim Bevan and Eric Fellner are producing with Lloyd Levin.

Greengrass last directed “The Bourne Ultimatum” and “United 93.” Ryan is coming off Miramax’s “Gone Baby Gone” and next stars in the Clint Eastwood-directed Universal pic “The Changeling.” She’s in the ensemble of “Before the Devil Knows You’re Dead,” as well as HBO series “The Wire.”

Kinnear just starred in the Marc Abraham-directed “Flash of Genius” for Spyglass and Universal and the U comedy “Baby Mama” and just wrapped DreamWorks’ “Ghost Town.”

Corone’s recent credits include “We Own the Night,” “Reservation Road” and HBO’s “Recount.”