Weeds alum Justin Kirk has been cast in the high-profile FX drama pilot Tyrant, from Howard Gordon, Gideon Raff and Craig Wright. Also cast in the project is Sibylla Deen. Tyrant tells the story of an unassuming American family — Barry, Molly and their kids — drawn into the workings of a turbulent Middle East nation. Kirk, repped by UTA, Management 360 and attorney PJ Shapiro. will play a sexy, decadent and mysterious American diplomat with a hidden agenda. Deen will play Nusrat, the young bride of Ahmad.