Brad Pitt as General Glen McMahon , a character based on General Stanley McChrystal . He is portrayed as an accomplished general with degrees from West Point and Yale brought in to bring a resolution to the conflict in Afghanistan . Anthony Hayes as Lieutenant Commander Pete Duckman , a Navy SEAL and member of McMahon 's staff , possibly based on Navy SEAL David Silverman . Emory Cohen as Sgt . Willy Dunne , General McMahon 's body man . RJ Cyler as USAF Tech Sgt . Andy Moon , information technology support assistant . Daniel Betts as USN Rear Admiral Simon Ball , McMahon 's Senior Public Affairs Officer . Topher Grace as Matt Little , a former lobbyist turned McMahon 's civilian media adviser . Anthony Michael Hall as Major General Greg Pulver , ISAF Director of Intelligence , loosely based on Lt. General Michael Flynn . John Magaro as Colonel Cory Staggart , an Army Ranger and General McMahon 's executive officer . Aymen Hamdouchi as Captain Badi Basim , a scholarly Afghan National Army officer who becomes General McMahon 's aide - de-camp . Scoot McNairy as Sean Cullen , a cynical journalist for Rolling Stone who accompanies McMahon and his staff and acts as narrator throughout the film , loosely based on author Michael Hastings . Meg Tilly as Jeanie McMahon , McMahon 's wife .

Question: actress who plays brad pitts wife in war machine
Answer: Meg Tilly