John Krasinski, James Badge Dale and Pablo Schreiber are already set to star.
Paramount will distribute the pic, which will recount the attack on the U.S. Special Mission Compound and a nearby CIA Annex in Benghazi, Libya, on the 11th anniversary of Sept. 11.
Martini will play a member of the six-man security team that fought to defend the many Americans stationed at the compound. Paramount had no comment.
Chuck Hogan penned the script based on Mitchell Zuckoff’s book “Thirteen Hours: A Firsthand Account of What Really Happened in Benghazi,” to which Paramount acquired rights in February, before it was published. Erwin Stoff produces through 3 Arts Entertainment’s production shingle.
Plan is to go into production this spring.
Martini has made a name for himself playing tough, hard-nosed characters with military backgrounds in films like “Pacific Rim” and “Captain Phillips,” so this role should fit right in his wheelhouse. Even his character as Christian Grey’s driver in “Fifty Shades of Grey” comes off as the strong, silent type.
Besides “Fifty Shades of Grey,” Martini can be seen next in Legendary’s supernatural action pic “Spectral,” which bows on Aug. 12, 2016. He is repped by ICM Partners and Annonymous Content.