Christopher Abbott Yossarian Actor Kyle Chandler Colonel Cathcart Actor George Clooney Scheisskopf Actor, Executive Producer Hugh Laurie Major de Coverley Actor Giancarlo Giannini Marcello Actor Daniel David Stewart Milo Actor Rafi Gavron Aarfy Actor Austin Stowell Nately Actor Graham Patrick Martin Orr Actor Gerran Howell Kid Sampson Actor Jonathan Rudnitsky McWatt Actor Kevin J. O'Connor Korn Actor Pico Alexander Clevinger Actor Tessa Ferrer Nurse Duckett Actor Lewis Pullman Major Major Actor Josh Bolt Dunbar Actor Jay Paulson Chaplain Actor Julie Ann Emery Marion Actor Grant Heslov Doc Daneeka Actor, Executive Producer, Director Richard Brown Executive Producer Steve Golin Executive Producer Luke Davies Executive Producer, Writer David Michôd Executive Producer, Writer