Kit Harington books first post-'Game of Thrones' role
"Testament of Youth" actor Kit Harington poses for a portrait on Wednesday, June 3, 2015 in New York. (Photo by Amy Sussman/Invision/AP)
NEW YORK, NY - JUNE 2: Kit Harington seen leaving a hotel on June 2, 2015 in New York City. Photo Credit: mpi67 / MediaPunch/IPX
NEW YORK, NY - APRIL 8: Kit Harington at Good Morning America promoting the new season of HBO's Game of Thrones in New York City on April 8, 2015. Credit: RW/MediaPunch/IPX
Kit Harington arrives at the Season 5 premier of "Game of Thrones" at the War Memorial Opera House, Monday, March 23, 2015, in San Francisco. (Photo/George Nikitin, Invision/AP)
Actors Taron Egerton, Colin Morgan, former MP Dame Shirley Williams, Kit Harington and Jonathan Bailey pose for photographers at the premiere for the film Testament of Youth, in London, Tuesday, Oct. 14, 2014. (Photo by Joel Ryan/Invision/AP)
Actors Kit Harington, left, and Peter Dinklage arrive at the 66th Primetime Emmy Awards at the Nokia Theatre L.A. Live on Monday, Aug. 25, 2014, in Los Angeles. (Photo by Matt Sayles/Invision for the Television Academy/AP Images)
Kit Harington, and from left, Rose Leslie and John Bradley attend the "Game of Thrones" panel on Day 2 of Comic-Con International on Friday, July 25, 2014, in San Diego. (Photo by Chris Pizzello/Invision/AP)
Kit Harington seen at the Twentieth Century Fox and DreamWorks Animation Los Angeles Premiere of 'How to Train Your Dragon 2' on Sunday, June 8, 2014, in Westwood, Calif. (Photo by Alexandra Wyman/Invision for Twentieth Century Fox/AP Images)
HOLLYWOOD, CA - MARCH 19: (L-R) David Benioff and Kit Harington participate at the Academy of Television Arts & Sciences Presents An Evening With "Game of Thrones" panel at the TCL Chinese Theater on March 19, 2013 in Hollywood, California. (Photo by Vince Bucci/Invision for the Academy of Television Arts & Sciences/AP Images)
HOLLYWOOD, CA - MARCH 19: Kit Harington poses for a portrait at the Academy of Television Arts & Sciences Presents An Evening With "Game of Thrones" at the TCL Chinese Theater on March 19, 2013 in Hollywood, California. (Photo by Brian Dowling/Invision for the Academy of Television Arts & Sciences/AP Images)
Kit Harington arrives at the 63rd Primetime Emmy Awards on Sunday, Sept. 18, 2011 in Los Angeles. (AP Photo/Matt Sayles)
Harington joins Guy Pearce, Dakota Fanning, Paul Anderson and GoT actress Carice van Houten -- who stars as Melisandre, a.k.a. The Red Woman, on the HBO epic.
Brimstone, written and directed by Dutch filmmaker Martin Koolhoven, is an epic Western that tells the story of a young woman (Fanning) who is forced to survive against the machinations of an evil preacher (Pearce). Principal photography is already underway in Spain, Germany and Romania.
Although Brimstone is Harington's first big role after his GoT departure, it isn't his only recent foray into film. Harington's war-time drama Testament of Youthhit screens earlier this month, and the 28-year-old actor sat down with ET to talk about playing a character much different than Jon Snow.